A Novel Computerized Visual Acuity Test for Children |
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| Authors: | Young Joo Shin In Bum Lee Won Ryang Wee Jin Hak Lee Jeong-Min Hwang |
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| Institution: | 1.Department of Ophthalmology, Hallym University College of Medicine, Chuncheon, Korea.;2.Department of Biomechanics, Seoul National University College of Medicine, Seoul, Korea.;3.Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. |
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| Abstract: | PurposeTo investigate the efficacy of a computerized visual acuity test, the SNU visual acuity test for children.MethodsFifty-six children, ranging from 1 to 5 years of age, were included. In a dark room, children gazed at and followed a circular dot with 50% contrast moving at a fixed velocity of 10 pixels/sec on a computer monitor. Eye movement was captured using a charge coupled device camera and was expressed as coordinates on a graph. Movements of the eye and dot were superimposed on a graph and analyzed. Minimum visualized dot diameters were compared to the Teller visual acuity.ResultsTen eyes (8.9%) of six children failed to perform the Teller visual acuity test, and two eyes (1.8%) of one patient failed to perform the SNU visual acuity test. The observed Teller visual acuity and SNU visual acuity were significantly correlated (p < 0.001). Visual angle degrees converted from the Teller visual acuity and SNU visual acuity were also significantly correlated (p < 0.001).ConclusionThe SNU visual acuity using moving targets correlated well with Teller visual acuity and was more applicable than the Teller acuity test. Therefore, the SNU visual acuity test has potential clinical applications for children. |
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| Keywords: | Child SNU dot visual acuity test Teller visual acuity test Visual acuity test Visual angle |
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