Guided light and diffraction model of human-eye photoreceptors.
The photoreceptors of the living human eye are known to exhibit waveguide-characteristic features. This is evidenced by the Stiles-Crawford effect observed for light incident near the pupil rim, and by the directional component of light reflected off the retina in the related optical Stiles-Crawford effect. We describe a model for the coupling of light to/from photoreceptors on the basis of waveguide theory that includes diffraction between the eye pupil and the photoreceptor apertures, and we show that valuable insight can be gained from a Gaussian approximation to the mode field. We apply this knowledge to a detailed study of the relationship between the Stiles-Crawford effect and its optical counterpart.
Vohnsen
Brian
B
Laboratorio de Optica, Universidad de Murcia, Campus de Espinardo (Edificio C), 30071 Murcia, Spain. vohnsen@um.es
Iglesias
Ignacio
I
Artal
Pablo
P
D003198:Computer Simulation; D006801:Humans; D008954:Models, Biological; D010775:Photic Stimulation / Q000379:methods*; D010786:Photoreceptor Cells / Q000502:physiology*; D012029:Refraction, Ocular / Q000502:physiology*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation