Automated Vision Tester Technology Development for Aircrew Clinical Vision Screening

Existing visual screening devices consist of illuminated test cards. By rotating the knob, images may be changed; however, once the system is loaded with cards it cannot be easily reconfigured. There are a limited number of cards that a unit can hold at one time, and it is impossible to change cards on the fly if a patients vision needs further investigation or if the clinician wants to do variable threshold testing. Computerized and/or automated vision testing has been described in the literature; however, implementation was limited by the available display and computer technology. With high- resolution optics and microdisplaysa cost-effective automated system is very achievable. SA Photonics proposed solution is an electronic AVT that uses COTS displays with standard electrical interfaces that can be plugged directly into a desktop computer running test software. This system will be low cost and will dramatically improve vision testing both within the USAF and for commercial use. An electronic Automated Visual Test (AVT) system would allow clinicians to tailor the images presented to each client as necessary, even providing the opportunity to change them mid-test if needed. Efficient threshold testing is easily accomplished via a simple input device under patient control.