Abstract
Conclusions
1. The distribution of retinal pigment is similar in the dark-adapted day-phase and dark-adapted night-phase eyes. 2. The distribution of retinal pigment is similar in the light-adapted day-phase and light-adapted night-phase eyes, as well as in the illuminated and non-illuminated eyes of the same animal. 3. The diurnal variations in visual function, described elsewhere, are, therefore, independent of retinal pigment migration and originate in the physiological mechanism of the visual process.
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