Automated Diagnosis and Measurement of Strabismus in Childre
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Manual measurements of strabismus are subjective, time consuming, difficult to perform in babies, toddlers, and young children, and rely on the examiner’s skill and experience. An automated system, based on eye tracking and dedicated full occlusion glasses, was developed to provide a fast, objective, and easy-to-use alternative to the manual measurements of strabismus. The objective of the study was to test the efficacy of the system in determining the presence of strabismus in children, as well as its type and the amount of deviation, in addition to differentiating between phorias and tropias.

A cross-sectional study included 69 children, aged 3-15 years. A cover uncover test (CUT) and a prism alternating cover test (PACT) for the primary gaze, at a distance of 50 cm, were performed by two independent, masked examiners and by the automated system.

A high correlation was found between the automated and the manual tests .The average automated test duration was 46 seconds. The Bland-Altman plot, which compared the two measurement methods, showed a mean value of -2.9 PD and a half-width of the 95% limit of agreement of ±11.4 PD.

The tested automated system provides precise detection and measurements of ocular misalignment and differentiates between phorias and tropias. It can be utilized in participants from 3 years of age and up.