Optimal Stimulus Conditions for Stereoacuity
Gerald Westheimer is the vision scientist whose groundbreaking research on visual perception, stereopsis, and eye movements has profoundly shaped our understanding of how the human visual system processes depth and spatial information.
Westheimer concluded that ‘…to be most effective in the measurement of stereoacuity, targets should be:
- Few in number, and well articulated
- Sharply delineated and in good focus binocularly
- With high contrast and, at a minimum, medium photopic luminance
- Minimally encumbered by the influence of prediction and memory
- As far as possible devoid of non-stereoscopic cues to depth.’
Westheimer picked out the Frisby as the only stereotest satisfying all of these criteria.
