Gorrand J M, Delori F C
Schepens Eye Research Institute, Boston, Massachusetts 02114, USA.
J Opt Soc Am A Opt Image Sci Vis. 1999 Jun;16(6):1229-37. doi: 10.1364/josaa.16.001229.
Light reflected specularly by the inner limiting membrane (ILM) provides information on the topography of the retinal surface. The ILM in the central part of the foveal pit acts as a concave mirror. Light reflected specularly by this mirror forms an image of the entrance pupil in front of the retina. In 15 normal subjects (ages 16-56 years) we have measured photometric and geometrical-properties of this image to derive two characteristics of the ILM: its reflectance rho at the foveola and its radius of curvature r in the central part of the fovea. rho and r are found to decrease significantly with age (p = 0.0073 and p = 0.01, respectively). The equations of the regression lines are log10 rho = -4.234 - 0.0118 age and radius r = 1484 - 13.6 age, respectively (age in years, r in micrometers).
由内界膜（ILM）镜面反射的光提供了视网膜表面地形的信息。黄斑中心凹中央部分的ILM起到凹面镜的作用。由该镜面反射的光在视网膜前方形成入瞳的图像。在15名正常受试者（年龄16 - 56岁）中，我们测量了该图像的光度学和几何特性，以得出ILM的两个特征：其在黄斑小凹处的反射率ρ及其在黄斑中心部分的曲率半径r。发现ρ和r均随年龄显著降低（分别为p = 0.0073和p = 0.01）。回归线方程分别为log10 ρ = -4.234 - 0.0118×年龄和半径r = 1484 - 13.6×年龄（年龄以年为单位，r以微米为单位）。
