However, stereopsis require that both eyes accurately fixate the stereotarget. Thus, discrepancies in the direction or velocity of gaze of the two eyes that do not decrease acuity can significantly impair stereo-performance. The initial steps towards conducting experiments proposed in this project have been successfully completed. These steps include experiment protocol design and development and configuration of software and hardware. An experiment system has been developed to measure visual acuity during large rapid gaze shifts.
Various procedures exists to estimate visual acuity.
Vernier threshold which is inversely related to acuity is used synonymously with Vernier acuity. The gaze of astronauts is impaired because of excessive retinal image velocity and extrafoveal imaging of targets. UH and NASA researchers experiment with protocol design and develop software and hardware configurations. One of the experiments deals with visual acuity during large rapid gaze shifts. The experiment system allows simultaneous threshold measurements from multiple locations.