| Cover | Jul. 14, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 14, 2022 |
| Entity File Number | 001-36747 |
| Entity Registrant Name | SECOND SIGHT MEDICAL PRODUCTS, INC. |
| Entity Central Index Key | 0001266806 |
| Entity Tax Identification Number | 02-0692322 |
| Entity Incorporation, State or Country Code | CA |
| Entity Address, Address Line One | 13170 Telfair Ave |
| Entity Address, City or Town | Sylmar |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91342 |
| City Area Code | (818) |
| Local Phone Number | 833-5000 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | EYES |
| Security Exchange Name | NASDAQ |
| Warrants [Member] | |
| Title of 12(b) Security | Warrants |
| Trading Symbol | EYESW |
| Security Exchange Name | NASDAQ |
