Marcos S, Tornow R P, Elsner A E, Navarro R
Instituto de Optica, Consejo Superior de Investigaciones Cientificas, Madrid, Spain.
Vision Res. 1997 Jul;37(14):1909-15. doi: 10.1016/s0042-6989(96)00295-7.
Foveal cone spacing was measured in vivo using an objective technique: ocular speckle interferometry. Cone packing density was computed from cone spacing data. Foveal cone photopigment density difference was measured in the same subjects using retinal densitometry with a scanning laser ophthalmoscope. Both the cone packing density and cone photopigment density difference decreased sharply with increasing retinal eccentricity. From the comparison of both sets of measurements, the computed amounts of photopigment per cone increased slightly with increasing retinal eccentricity. Consistent with previous results, decreases in cone outer segment length are over-compensated by an increase in the outer segment area, at least in retinal eccentricities up to 1 deg.
使用一种客观技术——眼散斑干涉测量法在活体中测量中央凹视锥细胞间距。根据视锥细胞间距数据计算视锥细胞堆积密度。在同一受试者中，使用扫描激光检眼镜的视网膜密度测量法测量中央凹视锥细胞光色素密度差异。视锥细胞堆积密度和视锥细胞光色素密度差异均随视网膜偏心度增加而急剧下降。通过对两组测量结果的比较，每个视锥细胞的光色素计算量随视网膜偏心度增加而略有增加。与之前的结果一致，视锥细胞外段长度的减少至少在视网膜偏心度达到1度时会被外段面积的增加过度补偿。
