Volumetric integration model of the Stiles-Crawford effect of the first kind and its experimental verification

Journal of vision

Brian Vohnsen¹  Alessandra Carmichael¹  Salihah Qaysi¹  Denise Valente¹  Najnin Sharmin¹ 

[1] Advanced Optical Imaging Group, School of Physics, University College Dublin, Dublin, Ireland

关键词: optics;    pupil;    vision;    eye;    retina;    pupil size;    diameter;    verification;    psychophysics;    light;    lighting;    process of absorption;    photopsia;    volume;    retinal pigments;    retinal cone;    emmetropia;   

DOI  :  10.1167/17.12.18

学科分类：眼科学

来源: Association for Research in Vision and Ophthalmology

【 摘 要 】

The integrated Stiles-Crawford function is commonly used as apodization model for vision through the natural eye pupil. However, this method does not account for possible effects related to the retinal thickness, the large length-to-diameter aspect ratio of the photoreceptors, or the use of nonMaxwellian illumination. Here, we introduce a geometrical optics model to calculate the fraction of overlap between light at the retina and the photoreceptor outer segments where absorption triggers vision. The model, which does not account for photoreceptor waveguiding, is discussed for both Maxwellian and nonMaxwellian illumination. The integrated Stiles-Crawford effect is analyzed experimentally with a uniaxial pupil-size flicker methodology and we find that the psychophysical measurements match better to the geometrical optics predictions than direct integration of a Stiles-Crawford function.

【 授权许可】

CC BY