EXHIBIT 23.1
 
                         INDEPENDENT AUDITORS' CONSENT
 
We consent to the incorporation by reference in Registration Statement No.
333-45049 of OSI Systems Inc. and Subsidiaries on Form S-8 of our report dated
September 11, 1998, appearing in this Annual Report on Form 10-K of OSI
Systems Inc. and Subsidiaries for the year ended June 30, 1998.
 
DELOITTE & TOUCHE LLP
Los Angeles, California
 
September 11, 1998.