Abstract

Human photoreceptor alignment can be noninvasively studied by measuring the Stiles-Crawford effect (SCE). Typically, the SCE is measured by determining the relative efficiency of light in eliciting a visual response as a function of the locus of entry within the pupil (see Figure 1). Since the origin of the SCE is largely attributed to the waveguide nature of the photoreceptors, the SCE can be used to infer the principal alignment tendencies (peak of the effect) and distributive properties (width of the effect) of the population of photoreceptors under test.

© 1985 Optical Society of America