Modelling retinal photoreceptor directionality in the human eye

摘要

Retinal photoreceptors are essentially directed towards the centre of the eye’s pupil. It was suggested that the photoreceptors directionality is linked to the optical aberrations induced by the cornea and crystalline lens in the eye in a way that the total system performance isoptimised. We show that cone irectionality can be modelled using a two-dimensional Gaussian function whose parameters vary according to the measured monochromatic aberrations of the eye. Our modelling is based on a hypothesis that cones directionality is optimised so that the resulting retinal image quality is maximised. This methodology can also be used in automatic image enhancement systems for correcting higher-order aberrations.