PURPOSE: To validate a method of measuring grating acuity with remote @entity9529 ( @entity9529 ) against a current clinical test of visual acuity (VA), the Teller Acuity Cards (TACs), as part of the development of an automated VA test for @entity1 . METHODS: Visual acuity for computer-generated horizontal square-wave gratings was determined from relative fixation time on a grating area compared with the background. In experiment 1, binocular VA was based on eye movements with a @entity9529 in 15 uncorrected myopic adults and compared with VA measured with subjective responses with the same stimuli and with the TACs. In experiment 2, binocular VA was determined in 19 typically developing @entity1 aged 3 to 11 months on two visits with both the @entity9529 and TACs. RESULTS: In adults, the mean difference between VA measured by the @entity9529 and TACs was 0.01 log cycles per degree (cpd) and the 95% limits of agreement were 0.11. One hundred percent of @entity9529 VA results were within 0.5 octave of the TACs' VAs. The mean difference between the @entity9529 and TACs for @entity1 was 0.17 log cpd on both the first and second visit (95% limits of agreement, 0.42 and 0.47, respectively). The mean difference between test and retest for @entity1 @entity9529 VA was 0.06 log cpd, and limits of agreement for repeatability were 0.48 log cpd. In @entity1 , both the TACs and the @entity9529 had a reliability of 89% within less than or equal to 1 octave between visits. Gaze tracking VA improved with age and is in agreement with published norms. CONCLUSIONS: The agreement between the TACs and @entity9529 in adults and @entity1 validates the method of measuring grating acuity with the remote @entity9529 . These results demonstrate its potential for an automated test of @entity1 VA.

Measuring XXXX Visual Acuity with Gaze Tracker Monitored Visual Fixation.

@entity1 :: ('9606', 'Species') :: ['infants', 'infant'] @entity9529 :: ('MESH:D020417', 'Disease') :: ['GT', 'gaze tracking']
@entity1 :: (9606,Species) :: ['Infant']
