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Objective Measurement of Distance Visual Acuity Determined by Computerized Optokinetic Nystagmus Test

Cited 20 time in Web of Science Cited 21 time in Scopus
Issue Date
2010-02
Publisher
ASSOC RESEARCH VISION OPHTHALMOLOGY INC
Citation
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE; Vol.51 2; 752-757
Abstract
PURPOSE. To investigate the efficacy of a computerized optokinetic nystagmus (OKN) test in evaluating the objective distance visual acuity and to determine the correlation between subjective and objective visual acuities. METHODS. This prospective, noninterventional study included 83 eyes of 83 volunteers. Objective visual acuity was defined as the smallest size stripe that evoked the OKN response (induction method) or as the smallest dot size that suppressed the OKN response (suppression method). Distance visual acuity was measured by computerized OKN and infrared oculography at distance. The reproducibility of the test was evaluated by intraclass correlation coefficient (ICC). The correlation between measured objective and subjective visual acuity was then evaluated with linear regression analysis. Subjects were grouped according to their objective visual acuity, and the mean subjective visual acuities were compared with those of the objective visual acuity groups. RESULTS. There was a significant correlation between distance objective and subjective visual acuity (correlation coefficient R(2), induction method: suppression method = 0.566: 0.832, P < 0.05). The mean subjective visual acuity was significantly different in the objective visual acuity groups (Welch`s ANOVA, P = 0.000 for induction and suppression methods). The objective visual acuity test showed good reproducibility (ICC; induction method: suppression method = 0.945: 0.988, P < 0.05). CONCLUSIONS. The computerized OKN test could serve as an objective and reliable tool for assessing distance visual acuity. (Invest Ophthalmol Vis Sci. 2010; 51: 752-757) DOI: 10.1167/iovs.09-4362
ISSN
0146-0404
Language
English
URI
https://hdl.handle.net/10371/77901
DOI
https://doi.org/10.1167/iovs.09-4362
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College of Medicine/School of Medicine (의과대학/대학원)Ophthalmology (안과학전공)Journal Papers (저널논문_안과학전공)
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