Applegate R A
Department of Ophthalmology, University of Texas Health Science Center at San Antonio, 78230-6230, USA.
J Refract Surg. 2000 Sep-Oct;16(5):S547-51. doi: 10.3928/1081-597X-20000901-10.
Non-invasive wavefront sensing of the human eye provides the necessary information to design corrections which minimize the monochromatic optical errors of the eye beyond simple sphere (defocus) and cylinder (astigmatism). These "ideal" corrections must move with the eye, maintaining proper alignment with the eye's optics. Viable modes of correction include contact lenses, refractive surgery and intraocular lenses. Will these "ideal" corrections lead to better vision? If so, how much better? Here we explore the limits imposed by the optical and neural design of the eye. For larger pupil sizes (>3 mm diameter) "ideal" corrections improve the optical quality of the retinal image beyond the limits imposed by photoreceptor spacing. Photoreceptor spacing limits visual acuity to between 20/8 and 20/10. Correcting the higher order aberrations will provide images with higher contrast and crisper edges. When perfected, "ideal" corrections will provide for high contrast visual acuity between 20/8 and 20/10.
人眼的非侵入式波前传感提供了必要信息，以设计矫正方案，将眼睛的单色光学误差最小化，超越简单的球镜（散焦）和柱镜（散光）。这些“理想”矫正必须随眼睛移动，与眼睛的光学系统保持正确对准。可行的矫正方式包括隐形眼镜、屈光手术和人工晶状体。这些“理想”矫正会带来更好的视力吗？如果是，能好多少？在这里，我们探讨眼睛的光学和神经设计所施加的限制。对于较大的瞳孔尺寸（直径>3毫米），“理想”矫正可将视网膜图像的光学质量提升至超过光感受器间距所施加的限制。光感受器间距将视力限制在20/8至20/10之间。矫正高阶像差将提供对比度更高、边缘更清晰的图像。完善后，“理想”矫正将实现20/8至20/10之间的高对比度视力。
