On the grounds of clinico-physiologic investigations the author revises the existing dual theory of photoreception. The paper describes complex clinical investigations of visual functions in patients with alimentary and essential hemeralopias and shows that rods and cones do not function in conditions of scotopic illumination without the presence of… (More)
The paper describes data on conditions for appearance of a physiologic central retinal scotoma of dark adaptation. Examinations of 80 eyes with normal visual functions have shown that central scotoma of dark adaptation is revealed in conditions of scotopic illumination 20-25 minutes after dark adaptation. The optimal duration of dark adaptation is 40-45… (More)
The optic nerve of the dog has been histologically studied. In the intact nerve 160,000 axons have been revealed. In 3 weeks after the nerve section in the orbit and near the nerve disk 72% retinoencephal fibers, 28% encephaloretinal and 0.23% of centrofugal axons are found.