Optical properties of retinal photoreceptors and the Campbell effect.
In 1958, Campbell observed that certain artificial pupil displacements could considerably change acuity (measured by viewing gratings) while others had very little effect. He sought an explanation of the small retinal contribution to those effects that was consistent with the Stiles-Crawford effect. This paper suggests an explanation that satisfies that requirement using a waveguide model of the retinal cones. We show that the waveguiding properties of the receptors make them sensitive to obliquely incident exciting waves and this provides some support for the hypothesis that both the Stiles-Crawford and Campbell effects are manifestations of the same underlying waveguide nature of the receptors.
Pask
C
C
School of Mathematics and Statistics, University College, Australian Defence Force Academy, Canberra, ACT, Australia. c-pask@adfa.dz.au
Stacey
A
A
D005584:Fovea Centralis; D006801:Humans; D008433:Mathematics; D008959:Models, Neurological; D010364:Pattern Recognition, Visual / Q000502:physiology*; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D013053:Spectrophotometry; D014792:Visual Acuity