For a study, researchers sought to determine if it would be feasible to evaluate binocular vision using the automated acuity card procedure (AACP), a novel automated technique that uses eye-tracking technology.
Participants 5 to 36 months old were enrolled in the study. The AACP and Teller Acuity Cards (TACs) were used to assess the binocular grating acuity at a uniform testing distance of 55 cm in a random sequence. The AACP’s electronic stimuli were nearly identical to the printed TACII stimuli in size and shape. From the captured picture sequences, the AACP monitored the participant’s gaze and automaticfrom the captured picture sequences ally calculated the grating acuity. Comparisons between the AACP and TACs were made in terms of differentiation, correlation, and consistency. In the end, 155/201 participants, or 77.11%, finished both exams.
Fewer individuals (15 [7.46%] than 31 [15.42%]) failed the TAC exam than the AACP. The median, interquartile range (IQR) for the AACP was 60 [IQR = 41] seconds, whereas the IQR for the TAC was 185 [IQR = 66] seconds, with a P< 0.001. The visual acuities of the AACP and TAC were strongly linked (r = 0.83, P< 0.001). According to Bland-Altman plots, there is a mean difference in visual acuity between AACP and TAC of 0.10 cycles per degree (cpd; 95% limits of agreement = 7.70 cpd). There were no significant differences between the tests, and results from both the AACP and TACs showed that visual acuity increased with age (both, P< 0.001).
The AACP was used to show electronic stimuli, and the results provided therapeutically important information on the grating acuity of newborns and toddlers. Regarding testability, reproducibility, and accuracy, AACP performance was on par with TACs, the current clinical gold standard for evaluating baby vision.