Abstract

Hyperacuity is defined as the ability to perceive a difference in relative spatial localization of 2 or more visual stimuli to the order of 3 - 8 seconds of arc (Westheimer, 1979). The two dot vernier task is an example of a hyperacuity task. Hyperacuity stimuli are highly resistant to retinal image degradation and are, therefore, of clinical importance as a test of visual function in patients with partially opaque media or scattering bodies (see Enoch, et al., 1985 for a review). Hyperacuity techniques do not require a window through the anomalous media.

© 1991 Optical Society of America