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A technique is described whereby it is possible to measure, by a direct physical method, stray light in the excised eye of the cat, steer, and human. Systematic changes in the measures obtained are noted as a function of time following removal. When time correction factors, based on a cat eye, are applied to cat, steer, and human data, no significant difference in the distribution of stray light in the eyes of the three species is obtained. Experiments with steer eyes lead to the conclusion that the principal component of stray light is scatter. The results of this research are compared to those of three studies where estimates of intraocular stray light were based on psychophysical judgements of the effects of glare stimuli. It is concluded that there is more than enough stray light in the human eye to account for these effects. The discrepancy is attributed mainly to the directional sensitivity of the cones.
Boynton et al. (Mon,) studied this question.