On the quanta explanation of vision
article
In determining the smallest amount of energy necessary for vision fluctuating results are found: a flash originating from a constant light source is sometimes seen and sometimes not. Out of the work of van der Velden it proved that the fluctuating phenomenon mentioned is due to the statistical behaviour of the light quanta: a pure quantum physical aspect. From his investigation on the seeing of flashes he concluded that 7° nasal from the fovea for rod vision of the dark adapted eye independent of the observer two quanta must be absorbed in the visual purple within about 0,02 seconds and within an area of the retina corresponding to a visual angle of about 10′ in order to perceive light.
TNO Identifier
3602
Source
Documenta Ophthalmologica, 4, pp. 23-115.
Pages
23-115
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