Department of Ophthalmology, Seoul National University, Seoul, Korea.
Invest Ophthalmol Vis Sci. 2010 Feb;51(2):752-7. doi: 10.1167/iovs.09-4362. Epub 2009 Oct 15.
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.
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.
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).
The computerized OKN test could serve as an objective and reliable tool for assessing distance visual acuity.
研究计算机视动性眼球震颤（OKN）测试评估客观远距视力的疗效，并确定主观和客观视力之间的相关性。
这是一项前瞻性、非干预性研究，共纳入 83 名志愿者的 83 只眼。客观视力定义为引发 OKN 反应的最小条纹尺寸（诱导法）或抑制 OKN 反应的最小点尺寸（抑制法）。远距视力通过计算机 OKN 和远距红外眼动描记法进行测量。采用组内相关系数（ICC）评估测试的可重复性。然后，采用线性回归分析评估测量的客观和主观视力之间的相关性。根据客观视力将受试者分组，并将主观视力的平均值与客观视力组进行比较。
远距客观和主观视力之间存在显著相关性（相关系数 R²，诱导法：抑制法=0.566:0.832，P<0.05）。客观视力组之间的平均主观视力存在显著差异（诱导法和抑制法的 Welch 方差分析，P=0.000）。客观视力测试具有良好的可重复性（ICC；诱导法：抑制法=0.945:0.988，P<0.05）。
计算机视动性眼球震颤测试可作为评估远距视力的客观、可靠工具。
