Rynders M C, Grosvenor T, Enoch J M
School of Optometry, Indiana University, Bloomington, USA.
Optom Vis Sci. 1995 Mar;72(3):177-85. doi: 10.1097/00006324-199503000-00005.
The relative luminous efficiency curves for light entering different parts of the entrance pupil [Stiles-Crawford functions (SCFs)] of subject TG, whose right eye is amblyopic, were determined earlier for both the normal and the amblyopic eye. The left eye was found to have a normal SCF, varying from the center to the edge of the entrance pupil by an entire log unit. However, the SCF for the right eye was found to be abnormal, showing peak sensitivity far toward the temporal edge of the pupil and varying from center to edge by only one-third of a log unit. From these data it was inferred that the photoreceptors were in poor alignment. In October, 1993 the subject experienced a retinal detachment in the left (nonamblyopic) eye, requiring cryoretinopexy, drainage of subretinal fluid, and a scleral buckle. Postoperatively, visual acuity recovered to 6/9 to 6/7.5 (20/30 to 20/25), but vision was poor when illumination or contrast was low. In order to determine whether the decrement in visual performance was the result of misalignment of the photoreceptors, the subject's SCFs were determined 9 months postoperatively for both eyes, using a procedure similar to that used earlier. The relative luminous efficiency curves for both eyes were found to be surprisingly similar to the corresponding curves found 38 years earlier. It was concluded that any decrease in visual function resulting from the retinal detachment and repair was not caused by misalignment of the photoreceptors. We infer that the mechanisms resulting in the exceptionally high degree of photoreceptor alignment in the left eye and the disturbed alignment in the right eye are still present.
右眼弱视的受试者TG，其进入入瞳不同部位的光的相对发光效率曲线[斯泰尔斯-克劳福德函数（SCF）]，之前已针对正常眼和弱视眼进行了测定。发现左眼具有正常的SCF，从入瞳中心到边缘变化了整整一个对数单位。然而，发现右眼的SCF异常，其峰值敏感度 far toward瞳孔的颞侧边缘，并且从中心到边缘仅变化了三分之一个对数单位。从这些数据推断，光感受器排列不佳。1993年10月，该受试者左眼（非弱视眼）发生视网膜脱离，需要进行冷冻视网膜固定术、视网膜下液引流和巩膜扣带术。术后，视力恢复到6/9至6/7.5（20/30至20/25），但在照明或对比度较低时视力较差。为了确定视觉性能的下降是否是光感受器排列不齐的结果，术后9个月使用与之前类似的程序测定了该受试者双眼的SCF。发现双眼的相对发光效率曲线与38年前发现的相应曲线惊人地相似。得出的结论是，视网膜脱离和修复导致的视觉功能下降不是由光感受器排列不齐引起的。我们推断，导致左眼光感受器排列异常高度整齐和右眼排列紊乱的机制仍然存在。
