Kruger P B, Mathews S, Aggarwala K R, Sanchez N
Schnurmacher Institute for Vision Research, State College of Optometry, State University of New York, NY 10010.
Vision Res. 1993 Jul;33(10):1397-411. doi: 10.1016/0042-6989(93)90046-y.
Longitudinal chromatic aberration of the eye (LCA) produces "color fringes" at edges that specify focus. Fincham [(1951) British Journal of Ophthalmology, 35, 381-393] concluded that these chromatic effects were important for accommodation, but most investigators disagree. We monitored accommodation in 25 subjects while they viewed a sinusoidally moving target (1.5-2.5 D at 0.2 Hz) in a Badal optometer. The target was monochromatic (590 nm with 10 nm bandwidth), or white (3000 K) with LCA normal, neutralized or reversed. Sensitivity to the effects of LCA is profound and widespread. Gain decreases substantially and phase-lag increases when LCA is eliminated, and reversing the aberration severely disrupts accommodation. The ordered arrangement of spectral foci produced by LCA seems to be a fundamental aspect of the stimulus for "reflex" accommodation.
眼睛的纵向色差（LCA）会在确定焦点的边缘产生“彩色条纹”。芬奇姆[（1951年）《英国眼科杂志》，35卷，381 - 393页]得出结论，这些色差效应对于调节很重要，但大多数研究者并不认同。我们在25名受试者通过巴达尔验光仪观看正弦运动目标（0.2赫兹时为1.5 - 2.5屈光度）时监测其调节情况。目标为单色光（590纳米，带宽10纳米），或白色光（3000开尔文），且LCA处于正常、中和或反转状态。对LCA效应的敏感性深刻且广泛。消除LCA时增益大幅下降且相位滞后增加，而使像差反转会严重干扰调节。由LCA产生的光谱焦点的有序排列似乎是“反射性”调节刺激的一个基本方面。
