Eizenman M, Trope G E, Fortinsky M, Murphy P H
Department of Ophthalmology, University of Toronto, ON.
Can J Ophthalmol. 1992 Dec;27(7):336-40.
The stability of fixation of 12 healthy young subjects was assessed with a high-resolution eye tracker during automated perimetry. All the subjects exhibited eye movements and fixation shifts during the examination. The average shift in eye position between successive 1-minute intervals ranged from 0.41 degrees to 2.11 degrees, and the average standard deviation of eye position around the average of each interval ranged from 0.56 degrees to 2.55 degrees. In nine of the subjects the eye remained within 3 degrees of centre for 96% or more of the stimuli. The remaining three subjects experienced difficulty maintaining central fixation: the eye was more than 3 degrees away from centre for 28% or more of the stimuli. In the latter subjects the ability to repeatedly stimulate the intended retinal test locations was substantially reduced. The authors discuss the effects of unstable fixation on short-term fluctuation and on fixation loss.
在自动视野检查期间，使用高分辨率眼动仪对12名健康年轻受试者的注视稳定性进行了评估。所有受试者在检查过程中均出现了眼球运动和注视点偏移。连续1分钟间隔之间眼位的平均偏移范围为0.41度至2.11度，每个间隔平均值周围眼位的平均标准差范围为0.56度至2.55度。在9名受试者中，96%或更多的刺激期间眼睛保持在中心3度范围内。其余3名受试者在维持中心注视方面存在困难：28%或更多的刺激期间眼睛偏离中心超过3度。在后者这些受试者中，反复刺激预期视网膜测试位置的能力大幅降低。作者讨论了不稳定注视对短期波动和注视丢失的影响。
