Parafoveal function is important for daily visual tasks such as reading. Here the variability in cone density along the four cardinal meridians in parafoveal regions of the retina was investigated in vivo using an adaptive optics fundus camera. Ten healthy normal trichromatic individuals were included in the study. There were significant differences in cone density between individuals at all four tested eccentricities (0.5, 1, 2 and 3°) and meridians. Cone density ranged from 34,900 to 63,000 cones/mm2 at 1° horizontally, and from 31,600 to 60,700 at 1° vertically. The results were consistent with those of Curcio et al. (1990), although between-individual variability is greater than previously reported in the parafovea from 1 to 3.2°.
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机译：中央凹功能对于日常视觉任务（例如阅读）很重要。在这里，使用自适应光学眼底照相机在体内研究了视网膜中央凹区域中沿四个主要子午线的视锥细胞密度的变化。该研究包括十名健康的正常三色个体。在所有四个测试的离心率（0.5、1、2和3°）与子午线之间，个体的视锥密度存在显着差异。圆锥密度在水平1°范围内为34,900到63,000圆锥/ mm 2 ，在垂直1°范围内为31,600到60,700。结果与Curcio等人的结果一致。 （1990年），尽管个体间的变异性大于1至3.2°的副中央凹的报道。
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