* Percentage of shares owned does not exceed one percent.

As of November 15, 2017, in addition to the information provided in the prospectus summary regarding the transactions, in the past three years, we have had the following material relationships with the selling stockholders or affiliates of a selling stockholder:

ProActive Capital Resources Group, LLC purchased 33,333 shares of common stock and 16,667 warrants in the November 2016 private placement for a per unit price of $0.60 each, with each unit consisting of one share of common stock and one warrant to purchase one-half of one share of common stock. In addition, ProActive Capital Resources Group, LLC purchased 14,925 shares of common stock in the October 2015 private placement for a price of $0.67 per share.

PLAN OF DISTRIBUTION

The selling stockholders, which as used herein includes donees, pledgees, transferees or other successors-in-interest selling shares of common stock or interests in shares of common stock received after the date of this prospectus from a selling stockholder as a gift, pledge, partnership distribution or other transfer, may, from time to time, sell, transfer or otherwise dispose of any or all of their shares of common stock or interests in shares of common stock on any stock exchange, market or trading facility on which the shares are traded or in private transactions. These dispositions may be at fixed prices, at prevailing market prices at the time of sale, at prices related to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices.

The selling stockholders may use any one or more of the following methods when disposing of shares or interests therein:

The selling stockholders may, from time to time, pledge or grant a security interest in some or all of the shares of common stock owned by them and, if they default in the performance of their secured obligations, the pledgees or secured parties may offer and sell the shares of common stock, from time to time, under this prospectus, or under an amendment to this prospectus under Rule 424(b)(3) or other applicable provision of the Securities Act of 1933, as amended, or the Securities Act, amending the list of selling stockholders to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus. The selling stockholders also may transfer the shares of common stock in other circumstances, in which case the transferees, pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.

In connection with the sale of our common stock or interests therein, the selling stockholders may enter into hedging transactions with broker-dealers or other financial institutions, who may in turn engage in short sales of the common stock in the course of hedging the positions they assume. The selling stockholders may also sell shares of our common stock short and deliver these securities to close out their short positions, or loan or pledge the common stock to broker-dealers who may in turn sell these securities. The selling stockholders may also enter into option or other transactions with broker-dealers or other financial institutions or the creation of one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).

The aggregate proceeds to the selling stockholders from the sale of the common stock offered by them will be the purchase price of the common stock less discounts or commissions, if any. Each of the selling stockholders reserves the right to accept and, together with their agents from time to time, to reject, in whole or in part, any proposed purchase of common stock to be made directly or through agents. We will not receive any of the proceeds from this offering.

The selling stockholders also may resell all or a portion of the shares in open market transactions in reliance upon Rule 144 under the Securities Act, provided that they meet the criteria and conform to the requirements of that rule.

The selling stockholders and any underwriters, broker-dealers or agents that participate in the sale of the common stock or interests therein may be "underwriters" within the meaning of Section 2(11) of the Securities Act. Any discounts, commissions, concessions or profit they earn on any resale of the shares may be underwriting discounts and commissions under the Securities Act. Selling stockholders who are "underwriters" within the meaning of Section 2(11) of the Securities Act will be subject to the prospectus delivery requirements of the Securities Act.

To the extent required, the shares of our common stock to be sold, the names of the selling stockholders, the respective purchase prices and public offering prices, the names of any agents, dealer or underwriter, any applicable commissions or discounts with respect to a particular offer will be set forth in an accompanying prospectus supplement or, if appropriate, a post-effective amendment to the registration statement that includes this prospectus.

In order to comply with the securities laws of some states, if applicable, the common stock may be sold in these jurisdictions only through registered or licensed brokers or dealers. In addition, in some states the common stock may not be sold unless it has been registered or qualified for sale or an exemption from registration or qualification requirements is available and is complied with.

We have advised the selling stockholders that the anti-manipulation rules of Regulation M under the Exchange Act may apply to sales of shares in the market and to the activities of the selling stockholders and their affiliates. In addition, to the extent applicable we will make copies of this prospectus (as it may be supplemented or amended from time to time) available to the selling stockholders for the purpose of satisfying the prospectus delivery requirements of the Securities Act. The selling stockholders may indemnify any broker-dealer that participates in transactions involving the sale of the shares against certain liabilities, including liabilities arising under the Securities Act.

We have agreed to indemnify the selling stockholders against liabilities, including liabilities under the Securities Act and state securities laws, relating to the registration of the shares offered by this prospectus.

We have agreed with the selling stockholders to keep the registration statement, of which this prospectus constitutes a part, effective until the earlier of (1) such time as all of the shares covered by this prospectus have been disposed of pursuant to and in accordance with the registration statement or (2) the date on which the shares may be sold without restriction pursuant to Rule 144 of the Securities Act.

DESCRIPTION OF SECURITIES TO BE REGISTERED

The following description of our capital stock and provisions of our Articles of Organization, as amended, and Bylaws, each as amended, is only a summary. You should also refer to our Articles of Organization, as amended, a copy of which is incorporated by reference as an exhibit to the registration statement, of which this prospectus is a part, and our Bylaws, a copy of which is incorporated by reference as an exhibit to the registration statement of which this prospectus is a part.

Common Stock

We are authorized to issue up to a total of 50,000,000 shares of common stock, par value $0.01 per share. Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of our stockholders. Holders of our common stock have no rights under our Articles of Organization, as amended, or our Bylaws regarding dividends unless and until dividends are declared by the board of directors, nor do they have any rights under our Articles of Organization, as amended, or our Bylaws regarding preemption rights. Each outstanding share of common stock is, and all shares of common stock to be issued in this offering, when they are paid for will be, fully paid and non-assessable.

INTERESTS OF NAMED EXPERTS AND COUNSEL

No expert or counsel named in this prospectus as having prepared or certified any part of this prospectus or having given an opinion upon the validity of the securities being registered or upon other legal matters in connection with the registration or offering of the securities being registered was employed for such purpose on a contingency basis, or had, or is to receive, in connection with this offering, a substantial interest, direct or indirect, in us or any of our subsidiaries, nor was any such person connected with us or any of our subsidiaries as a promoter, managing or principal underwriter, voting trustee, director, officer, or employee.

INFORMATION ABOUT THE COMPANY

DESCRIPTION OF BUSINESS

Overview

We have been developinga developer and manufacturingmanufacturer of advanced optical instruments since 1982. Today, the vast majority of our business is the design and manufacture of high-quality medical devices and approximately 3% of our business is the design and manufacture of military and industrial products. Our medical instrumentation line includes traditional endoscopes and endocouplers as well as other custom imaging and illumination products for use in minimally invasive surgical procedures. Much of our recent development efforts have been targeted at the development of next generation endoscopes. Over the last tenFor over fifteen years, we have funded internal research and development programs to develop next generation capabilities for designing and manufacturing 3D endoscopes and very small Microprecision™ lenses, anticipating future requirements as the surgical community continues to demand smaller and more enhanced imaging systems for minimally invasive surgery. Our unique proprietary technology in these areas, combined with recent developments in the areas of 3D displays and millimeter sized CMOS image sensors, has allowed us to begin commercialization of these technologies. Thus,We believe that new products based on these technologies provide enhanced imaging for existing surgical procedures which help to enable development of many new medical device products and related medical procedures.

The COVID-19 world-wide pandemic and the domestic and international impact of policy decisions being made in major countries around the world has had, and is expected to continue to have, an adverse impact on various aspects of our business. While we and many of our medical device and defense contracting customers continue to operate as essential businesses, we have taken various actions to augment our operating and human resource policies and procedures to guard against the potential health hazards of COVID-19. These augmented procedures can have a portionnegative impact on our operational efficiencies. Given the uncertainty surrounding the continuation of economic slow-downs domestically and abroad, we cannot predict with certainty at this time what the future impact of COVID-19 and resulting business and economic policies in the US and abroad will be on our up-coming financial operating results.

Effective June 1, 2019 we acquired the operating assets of Ross Optical Industries, Inc. of El Paso, Texas, which we began operating as a division of our Company beginning on that date. The accompanying financial statements include the results of operations of the Ross Optical division for the month of June 2019 and the entire fiscal year ended June 30, 2020 and the assets and liabilities of the division as of June 30, 2020 and 2019. The acquisition of the assets of Ross Optical Industries effective June 1, 2019 expands our optics components and assemblies business. All products supplied by Ross Optical include a custom or catalog optic, which is sourced through Ross Optical’s extensive domestic and worldwide network of optical fabrication companies. Most systems make use of optical lenses, prisms, mirrors and windows and range from individual optical components to complex mechano-optical assemblies. Products often include thin film optical coatings that are applied using the in-house coating department. Approximately 73% of Ross Optical revenues are from customers in the United States, 7% from Western Europe and 8% from Canada during the fiscal year ended June 30, 2020. Ross Optical’s sales are mostly resale of specialized optical components with the remainder being assemblies. Ross Optical does not perform revenue generating engineering services or internal research and development. The majority of Ross Optical sales are for industrial applications with the remainder split between military and medical device products.

Approximately 8% of our non-Ross Optical division revenue in fiscal year 2020 was from the design, manufacture and resale of optical products for military and defense and 2% for other industrial, non-medical products and approximately 32-34% of our revenues are nowin each of the fiscal years 2019 and 2020 were derived from engineering and design services we performed for our customers to incorporate our technologies and capabilities into their medical device products. Approximately 64-79% of our total revenues in fiscal years 2019 and 2020 were derived from the assembly and manufacture of endoscopic medical devises, sub-assemblies and optical components ordered by our customers and usually developed from the engineering and design services we perform for them. We believe that newexpect sales revenue increases to come from the orders from our customers to manufacture the products based on these technologies provide enhanced imaging for existing surgical procedureswe help them engineer and can enable development of many new medical device products and related medical procedures.design.

We believe thatBy combining the unique capabilities of our future success depends, to a large degree, on our ability to develop new opticalcompany with the Ross Optical division we are experiencing opportunities for expanded sales of each division products and services throughout the combined customer base. Additionally, Ross’ expanded worldwide vendor relationships are benefiting our traditional efforts to enhance the performance characteristics and methods of manufacture of existing products. Accordingly, we expect to continue to seek and obtain product-related design and development contracts with customers and to selectively investsource materials at competitive prices for our own funds on research and development, particularly in the areas of Microprecision™ optics, micro medical cameras, illumination, and 3D endoscopes.

For the fiscal year ended June 30, 2017, approximately 66% of our sales were made to nine customers. Of these, three are large, international, medical device companies who have been our customers for many years. These three customers continue to purchase products that we developed over five years ago, and both now purchase new products that were developed and launched into production by us more recently. The other six top customers have engaged our engineering services or purchase products that we developed in recent years, and which rely heavily on our unique, proprietary Microprecision™ lens technology and optical visualization system expertise.

Current sales and marketing activities are intended to broaden awareness of the benefits of our new technology platforms, which we believe are ready for general application to medical device projects requiring surgery-grade visualization from sub-millimeter sized devices and 3D endoscopy. We market directly to established medical device companies primarily in the United States that we believe could benefit from our advanced endoscopy visualization systems. Through this direct marketing, referrals, attendance at trade shows and a presence in online professional association websites, we have expanded our on-going pipeline of projects to significant medical device companies as well as well-funded emerging technology companies. We expect our customer pipeline to continue to expand as development projects transition to production orders and new customer projects enter the development phase.manufacturing activities.

History

We incorporated in Massachusetts in December 1982 and have been publicly-owned since November 1990. References to our Company contained herein include our two wholly-owned subsidiaries, Precise Medical, Inc. and Wood’s Precision Optics Corporation, Limited, except where the context otherwise requires. Effective June 1, 2019 we acquired the operating assets of Ross Optical Industries, Inc. of El Paso, Texas, which we began operating as a division of our Company beginning on that date.

Our website is www.poci.com.websites are www.poci.com and www.rossoptical.com. Information contained on our websitewebsites does not constitute part of this report.prospectus.

Principal Products and Services

Our Current Core Business: Since 1982, we have manufactured medical products such as endoscopes and endocouplers. We have developed and sold endoscopes incorporating various optical technologies including our proprietary Lenslock™ technology, for use in a variety of minimally invasive surgical and diagnostic procedures. Today, we produce endoscopes for various applications, which are CE marked and therefore certified for sale throughout the European Economic Area. Since 1985, we have developed, manufactured and sold a proprietary product line of endocouplers. We also design and manufacture custom optical medical devices to satisfy our customers’ specific requirements. In addition to medical devices, we also manufacture and sell components and assemblies specially designed for industrial and military use.

The acquisition of the assets of Ross Optical Industries effective June 1, 2019 expands our optics components and assemblies business. All products supplied by Ross Optical include a custom or catalog optic, which is sourced through Ross Optical’s extensive domestic and worldwide network of optical fabrication companies. Most systems make use of optical lenses, prisms, mirrors and windows and range from individual optical components to complex mechano-optical assemblies. Products often include thin film optical coatings that are applied by the Ross Optical division in-house coating department.

Microprecision™ Lenses and Micro Medical Cameras: While the size of endoscopes has gradually decreased over time, the widespread use of very small endoscopes, with diameters of one millimeter or smaller, has been limited, in part, we believe, by the inability of traditional lens fabrication methods to support these smaller sizes with good image quality and acceptable manufacturing costs. We believe our Microprecision™ optics technology provides a solution to this problem. Combined with recent advances by other companies in complementary metal-oxide-semiconductor, or CMOS, image sensor fabrication techniques, our Microprecision™ lenses and proprietary manufacturing techniques enable the manufacture of micro medical cameras at low prices and with sizes on the order of one millimeter or less, characteristics that make them well suited to medical applications.

In June 2015, we announced a partnership with OmniVision Technologies, Inc., and Fujikura, Ltd., in which we jointly developed a CMOS based camera module with a diameter of 1.6 mm and 400 x 400 pixel resolution, representing superior image quality for camera modules of its size. In June 2017, OmniVision Technologies, Inc. announced our collaboration with them in the development of an even smaller, high-quality optical solution based on a newly developed OmniVision image sensor integrated with our Microprecsion™ lenses. This solution enables even smaller diameter endoscopes for use in medical procedures.

We are currently engaged in development projects with numerous customers to design and produce even smaller CMOS based camera modules together with customized illumination using various technologies to match the needs of the medical device endoscopes. We are also currently designing disposable versions of our camera modules and assemblies designed for single-use and reduced risk of contamination from repeated use. We believe these on-going improvements are significant to the continued evolution and acceptance of our Microprecision™ technology platform.

We have been engaged by various customers for an increasing amount of development work relating to the design of endoscopes and camera assemblies that utilize our Microprecision™ technology. We have a limited amount ofpreviously received two production orders exceeding $1M each from two customers for thesetheir custom designed products, butand follow-on orders for equal or larger amounts from each of these two customers. We also believe we believe suchwill receive additional productions orders will increasefrom other customers currently in the future as a result of this development work.our engineering and design pipeline.

3D Endoscopes: Our 3D endoscopes provide next generation optical imaging for minimally invasive surgical procedures that utilize hand-held rigid endoscopes by using the brain’s natural ability to perceive depth, which is the third dimension, by viewing one’s environment through two eyes. Utilizing our proprietary technology to provide independent images to right and left eyes, surgeons can view the operative field with 3D perception.

Competition and Markets

We sell our products in a highly competitive market and we compete for business with both foreign and domestic manufacturers. Many of our current competitors are larger than us and have substantially greater resources than we do. In addition, there is an ongoing risk that other domestic or foreign companies who do not currently service or manufacture products for our target markets, some with greater experience in the optics industry and greater financial resources than we have, may seek to produce products or services that compete directly with ours.

While our resources are substantially more limited than those of some of our competitors, we believe that we can compete successfully in this market on the basis of product quality, price, delivery and innovation. Our success will depend, in part, on our ability to maintain a technological advantage over our competitors. To this end, we intend to continue to aggressively support and augment our internal engineering, research and development resources and to aggressively pursue patent protection for existing and new technology. We believe that our unique technical capabilities in the areas of Microprecision™ optics, micro medical cameras and illumination, as well as 3D endoscopes currently represent competitive advantages for us in the minimally invasive surgical device market.

The competitive advantage of our Ross Optical division is its ability to provide difficult-to-find optics, and, increasingly, to provide a broader range of services based on its ability to source optics worldwide and augmented by its ability to provide thin-film coatings and assembly.

Market Opportunities

Microprecision™ Lenses and Micro Medical Cameras: While other approaches exist for the manufacture of camera lenses, we design custom camera module assemblies with the combined objectives of low cost, small size, range of optical specifications and high image quality desired by our customer’s device specifications. By enabling the production of millimeter sized and smaller cameras with low manufacturing costs, we believe our Microprecision™ technology opens the possibility to replace existing re-sterilizable endoscopes with a single-use alternative. Also, the small size of our Microprecision™ lenses and micro medical cameras combined with our proprietary illumination techniques can provide visualization for existing procedures that are currently performed blind or with sub-optimal imaging, and we believe can facilitate the development of new surgical procedures that are currently impractical without sub-millimeter visualization instrumentation.

3D Endoscopes and Robotic Surgery SystemsSystems:: 3D endoscopes have been used for many years as part of robotic surgery systems partly because the market price of robotic surgery systems is high enough to support the cost of a high qualityhigh-quality custom 3D display. Competition amongst medical device companies, many of which are our customers for other products, in the area of 3D robotic surgery systems is increasing, and various companies are now pursuing less expensive, procedure specific robotic systems. We believe our experience and expertise in 3D endoscopes for medical applications could be a benefit to various companies in this area that could provide us with new product development and manufacturing opportunities.

Competition and Markets

We sell our products in a highly competitive market and we compete for business with both foreign and domestic manufacturers. Many of our current competitors are larger than us and have substantially greater resources than we do. In addition, there is an ongoing risk that other domestic or foreign companies who do not currently service or manufacture products for our target markets, some with greater experience in the optics industry and greater financial resources than we have, may seek to produce products or services that compete directly with ours.

While our resources are substantially more limited than those of some of our competitors, we believe that we can compete successfully in this market on the basis of product quality, price, delivery and innovation. Our success will depend, in part, on our ability to maintain a technological advantage over our competitors. To this end, we intend to continue to aggressively support and augment our internal engineering, research and development resources and to aggressively pursue patent protection for existing and new technology. We believe that our unique technical capabilities in the areas of Microprecision™ optics, micro medical cameras and illumination, as well as 3D endoscopes currently represent competitive advantages for us in the minimally invasive surgical device market.

Sales and Marketing

Current sales and marketing activities are intended to broaden awareness of the benefits of our new technology platforms and our successful application of these new technologies to medical device projects requiring surgery-grade visualization from sub-millimeter sized devices and 3D endoscopy, including single-use products and assemblies. We market our engineering design and manufacturing services relatingdirectly to 3D endoscopes, Microprecision™ optical components and micro medical cameras by leveraging our existing relationships with majorestablished medical device companies – manyprimarily in the United States that we believe could benefit from our advanced endoscopy visualization systems. Through this direct marketing, referrals, attendance at trade shows and a presence in online professional association websites, we have expanded our on-going pipeline of whom are current customers.projects to significant medical device companies as well as well-funded emerging technology companies. We intendexpect our customer pipeline to make ourcontinue to expand as development projects transition to production orders and new customer projects enter the development phase. Our Ross Optical division markets through existing customers and future technologies availabletrade shows, in addition to our customers for use in their currentproactive online marketing strategies executed primarily through its website. Through the gradual integration of the sales and newly developed minimally invasive surgicalmarketing resources of the two operations we have begun to realize both expanded sales opportunities of the Ross component products and to eventually develop and market our own proprietary products, which incorporate these new technologies. In addition to direct sales channels through our existing customermicro optics engineering services, as well as benefits from utilizing Ross’ worldwide vendor relationships and referrals, we also develop new sales opportunities through our website, email mailings and attendance at market specific tradeshows.for optical components.

International Business

We have had negligible direct export sales to date. However, our medical products have received the CE mark certification, which permits sales into the European Economic Area and which benefits our customers as they market their products manufactured by us or containing our sub-assemblies into markets outside the United States. In the future, we may establish or use additional production facilities overseas to produce key components for our business, such as lenses. SinceFrom the 1990s through approximately 2014, we have maintained a physical presence in Asia to support business and quality control activities throughout the region as needed. We continue to acquire various optical components from overseas to meet the needs of custom device designs. We believe that the availability of specialized components and cost savings from suchvarious overseas production may beresources is essential to our ability to deliver complex and unique device designs and to compete on a price basis in the medical products area particularly and to our profitability generally.

The addition of Ross Optical adds an expanded network of overseas suppliers of various types and sizes of optical components and assemblies that will enhance our ability to meet the material demands of our customers’ unique optical and medical device designs. During fiscal year 2020, 27% of the Ross Optical division sales were to customers outside of the United States, with 8%, 7% and 7% of total Ross Optical division sales to Canada, Western Europe and Singapore, respectively.

Research and Development

We believe that our future success depends, to a large degree, on our ability to continue to conceive and develop new optical products and technologies to enhance the performance characteristics and methods of manufacture of existing and new products. ResearchAlthough development work on behalf of customers is almost entirely performed under revenue generating contracts and customer purchase orders, research and development expenses are incurred on our own proprietary products and technology, such as Microprecision™ optics, micro medical cameras and 3D endoscopes, as well as on certain custom projects on behalf of our customers.endoscopes. Accordingly, we expect to continue to seek to obtain product-related designtreat engineering expenses not consumed in customer contracted development and our investment of funds and resources in internal product and intellectual property development as research and development contracts with customers and to invest our own fundsexpense in research and development.the accompanying statement of operations. For the years ended June 30, 20172020 and 2016,2019, research and development expenses were $464,162$886,129 and $478,267,$505,300, respectively.

Raw Materials and Principal Suppliers

A key raw material component for our products is precision grade optical glass, which we obtain from a few suppliers, principally SCHOTT North America, Inc. and Ohara Corporation.

We obtain CMOS sensors used in our development of endoscope products for our customers from various suppliers includingsuch as OmniVision Technologies, Inc., and AWAIBA Lda. We believe that while the number of sources of supply is limited for the CMOS sensors with the specifications used in medical device endoscopes we develop, the manufacturing capacities of those suppliers is adequate to meet our demand in the next twelve months. Likewise, a limited number of suppliers provide CMOS electronic cabling services for the smallest sensors, such as FujiKura, Ltd. and NET USA, Inc., and High Speed Interconnects. However, we believe our demand for these services is relatively small compared to these companies’ and others’ capacities for CMOS sensor electronic cabling services.

We have experienced supply disruptions and customer delays from certain vendors and customers that we believe were the result of the COVID-19 pandemic and related economic slow-down. Although we are not currently experiencing vendor supply issues as a result of COVID-19, we cannot predict with certainty at this time what the future impact of COVID-19 and resulting business and economic policies in the US and abroad will be on our vendors and principal suppliers.

Patents and Trademarks

We rely, in part, upon patents, trade secrets and proprietary knowledge as well as personnel policies and employee confidentiality agreements concerning inventions and other creative efforts to develop and maintain our competitive position. We plan to file for patents, copyrights and trademarks in the United States and in other appropriate countries to protect our intellectual property rights to the greatest extent practicable. We currently hold rights to various United States patents, and have patent applications pending, including applications for our new generation of micro medical cameras and 3D endoscopes. Our current patent portfolio includes patents, rights to patents and patent applications that cover various aspects of our technology in the following areas:

The patents contained in our current patent portfolio have various expiration dates ranging from December 2016 tothrough May 2036. We are not aware of any infringements of these patents. While we believe that our pending applications relate to patentable devices or concepts, these patents may not ultimately be issued and we may not be able to successfully defend these patents or effectively limit the development of competitive products and services.

In July 2011, we entered into an asset purchase agreement with Intuitive Surgical Operations, Inc., in which we received $2.5 million in connection with the sale of certain intellectual property. Pursuant to the agreement, we agreed to assign to Intuitive Surgical all of the issued and non-expired patents and pending patent applications that we held on the date of the agreement, and in return, Intuitive Surgical agreed to grant to us a royalty-free, worldwide license to these patents in fields outside of medical robotics.

We intend to continue to innovate and extend our technological capabilities in the areas of 3-D endoscopy Microprecision™ optics, micro medical cameras, and related illumination techniques, and to aggressively pursue patent protection for such developments.

Employees

As of June 30, 2017,2020, we had 2760 employees, 2358 of which were full-time employees. There were 1738 employees in manufacturing, 69 in engineering/research and development, 6 in sales, and 47 in finance and administration. We are not a party to any collective bargaining agreements. We believe our relations with our employees are very good.

CustomersCustomers

Revenues from our largest customers, as a percentage of total revenues, for fiscal years 20172020 and 20162019 were as follows:

NoDuring fiscal year 2020 we sold product and services to 643 customers in addition to those represented in the table above, and no other customer accounted for more than 10% of our revenues in fiscal years 20172020 and 2016.2019. At June 30, 2017,2020, our five largest customer account receivable balances were 16%, 15%, 12%, 12% and 11%, respectively,balance was 14% of total accounts receivable. At June 30, 2016,2019, our three largest customer account receivable balances were 19%, 13%, and 10%balance was 12% of the total accounts receivable. No other accounts accounted for more than 10% of accounts receivable at June 30, 20172020 or 2016.2019.

Environmental Matters

Our operations are subject to a variety of federal, state and local laws and regulations relating to the discharge of materials into the environment or otherwise relative to the protection of the environment. From time to time, we use a small amount of hazardous materials in our operations. We believe that we currently comply with all applicable environmental laws and regulations and intend to do our best efforts to remain in compliance.

Government Regulations

Domestic Regulation. We currently develop, manufacture and sell several medical products, the marketing of which is subject to governmental regulation in the United States. Medical devices are regulated in the United States by the Food and Drug Administration, or FDA, and, in some cases, by certain state agencies. The FDA regulates the research, testing, manufacture, safety, effectiveness, labeling, promotion and distribution of medical devices in the United States. Generally, medical devices require clearance or approval prior to commercial distribution. Additionally, certain material changes to, and changes in, intended uses of, medical devices are also subject to FDA review and clearance or approval. Non-compliance with applicable requirements can result in failure of the FDA to grant pre-market clearance or approval, withdrawal or suspension of approval, suspension of production, or the imposition of various other penalties.

We previously notified the FDA of our intent to market our endoscopes, image couplers, beamsplitters, adapters and video ophthalmoscopes, and the FDA has determined that we may market such devices, subject to the general control provisions of the Food, Drug and Cosmetic Act. We obtained this FDA permission without the need to undergo a lengthy and expensive approval process due to the FDA’s determination that such devices met the regulatory standard of being substantially equivalent to existing FDA-approved devices.

In the future, we plan to market additional medical devices that may require the FDA’s permission to market such products. We may also develop additional products or seek to sell some of our current or future medical products in a manner that requires us to obtain the permission of the FDA to market such products, as well as the regulatory approval or license of other federal, state and local agencies or similar agencies in other countries. The FDA has authority to conduct detailed inspections of manufacturing plants in order to assure that “good manufacturing practices” are being followed in the manufacture of medical devices, to require periodic reporting of product defects to the FDA and to prohibit the sale of devices, which do not comply with law.

Our Ross Optical division currently imports, exports and manufactures optical products for the defense industry, some of which is controlled by U.S. regulations. Generally, these regulations require strict control over technical data in documented form and as embodied in products, both within Ross Optical and as part of exported shipments. In particular, Ross Optical maintains a technology control plan, is ISO certified and ITAR (International traffic in Arms Regulations) registered with the U.S. State Department and maintains a number of technology assistance agreements with overseas suppliers, that have been approved by the U.S. State Department. Non-compliance with applicable requirements can result in U.S. actions that may result in withdrawal or suspension of approvals, suspension of company imports, exports or production, or the imposition of fines or various other penalties.

Foreign Requirements. Sales of medical device products outside the United States are subject to foreign regulatory requirements that may vary from country to country. Our failure to comply with foreign regulatory requirements would jeopardize our ability to market and sell our products in foreign jurisdictions. The regulatory environment in the European Union member countries of the European Economic Area for medical device products differs from that in the United States. Medical devices sold in the European Economic Area must bear the Conformité Européenne, or CE mark. Devices are classified by manufacturers according to the risks they represent, with a classification of Class III representing the highest risk devices and Class I representing the lowest risk devices. Once a device has been classified, the manufacturer can follow one of a series of conformity assessment routes, typically through a registered quality system, and demonstrate compliance to a “European Notified Body.” The CE mark may then be applied to the device. Maintenance of the system is ensured through annual on-site audits by the notified body and a post-market surveillance system requiring the manufacturer to submit serious complaints to the appropriate governmental authority. All of our medical products are manufactured in conformity with the CE mark requirements.

Available Information

Our website is www.poci.com. We make available on our website, free of charge, copies of our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports, as soon as reasonably practicable after we electronically file or furnish such materials to the U.S. Securities and Exchange Commission, or SEC. Our website and the information contained therein or connected thereto are not intended to be incorporated into this report.

You may also read and copy any materials we file with the SEC at the SEC's Public Reference Room, located at 100 F Street, N.E., Washington, DC 20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC at http://www.sec.gov.

DESCRIPTION OF PROPERTY

We conduct our domestic operations at three facilities in Gardner, Massachusetts. The main GardnerMassachusetts and one facility is leased from a corporation owned by Mr. Richard E. Forkey, who resigned from our board of directors on July 9, 2014.in El Paso, Texas. We are currently a tenant-at-will, paying rent of $9,000 per month.month for our main Gardner facility. We rent two other smaller Gardner facilities on a month-to-month basis. Our Ross Optical division rents a facility in El Paso, Texas from an unrelated party pursuant to an operating lease through May 2022 at monthly base rates beginning at $3,392 and increasing to $3,563 per month during the term of the lease.

We believe these facilities are adequate for our current operations and are adequately covered by insurance. Significant increases in production or the addition of significant equipment additions or manufacturing capabilities in connection with the production of our line of endoscopes and other products may, however, require improvements to existing facilities or the acquisition or lease of additional facilities. We may establish production facilities domestically or overseas to produce key assemblies or components, such as lenses, for our products. Overseas facilities may subject us to the political and economic risks associated with overseas operations. The loss of or inability to establish or maintain such additional domestic or overseas facilities could materially adversely affect our competitive position and profitability.

LEGAL PROCEEDINGS

Our Company, on occasion, may also bebecome involved in other legal matters arising in the ordinary course of our business. While management believes that such matters are currently insignificant, matters arising in the ordinary course of business, for which we are or could become involved in litigation may have a material adverse effect on our business, financial condition or results of operations. We are not currently aware of any pending or threatened litigation against us or our officers and directors in their capacity as such that could have a material impact on our operations or finances.

MARKET PRICE OF AND DIVIDENDS ON COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

Market Information

Our common stock is quoted on OTCQB, the OTC market tier for companies that report to the SEC, under the symbol PEYE. The following table sets forth the high and low bid prices for our common stock for each quarter during the last two fiscal years and the first quarter of the current fiscal year as quoted on OTCQB. Such OTC market quotations reflect inter-dealer prices, without retail markup, markdown or commissions and may not necessarily represent actual transactions.