Navarro R, Losada M A
Instituto de Optica Daza de Valdés (C.S.I.C.), Madrid, Spain.
Optom Vis Sci. 1997 Jul;74(7):540-7. doi: 10.1097/00006324-199707000-00023.
We propose a new method for ray tracing in the living human eye. It consists of delivering a narrow light pencil from an unexpanded laser beam and recording the integrated energy and position of the aerial image formed by the outgoing beam (after reflection off the retina and passage through the fully open pupil of the eye and camera lens). The lateral displacement of the aerial image is proportional to the geometrical aberration (displacement) of the incoming ray at the retina. In addition, its integrated energy is proportional to retinal reflectance that is highly directional [related to the Stiles-Crawford (SC) effect and to the effective pupil transmittance]. This method permits us, by delivering rays through different equispaced positions at the pupil plane, to sample the complex pupil function: its magnitude is a measure of the effective pupil transmission and its phase is the wave aberration. Experimental results, aberrations, and reflectometric directionality for four subjects are consistent with previous findings.
我们提出了一种在活人眼中进行光线追踪的新方法。该方法包括从未扩展的激光束发射一束窄光，并记录出射光束（从视网膜反射后，通过眼睛完全张开的瞳孔和相机镜头）形成的空中图像的积分能量和位置。空中图像的横向位移与入射光线在视网膜处的几何像差（位移）成正比。此外，其积分能量与视网膜反射率成正比，视网膜反射率具有高度方向性[与斯泰尔斯-克劳福德（SC）效应和有效瞳孔透过率有关]。通过在瞳孔平面的不同等间距位置发射光线，这种方法使我们能够对复杂的瞳孔函数进行采样：其幅度是有效瞳孔透射率的度量，其相位是波像差。四名受试者的实验结果、像差和反射测量方向性与先前的研究结果一致。
