Consists of three stereoscopic tests employing polarised vectographs.
The fly dramatically demonstrates the presence of stereo vision. The other two tests provide the practitioner with results to estimate the level of stereoscopic vision.
The Stereo Fly SO-001 is recognized as the standard for stereo depth-perception testing, evaluating both gross stereopsis (2500 to 1200 seconds of arc) and fine depth perception.
The test includes:
- Graded circle test (800 to 40 seconds of arc)
- Animal test for children (400 to 100 seconds of arc)
- One pair of polarised spectacles