Vision in dim light

David H. Hubel ()
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David H. Hubel: Harvard Medical School

Nature, 1997, vol. 388, issue 6637, 32-33

Abstract: Abstract On testing my own vision in very dim light I observed two phenomena associated with the lack of retinal rods (the receptors specialized for vision in dim light) in the fovea, the region corresponding to our centre of gaze. First, a bright (or dark) straight line passing through the fovea was seen as discontinuous, with a clear 1° gap. Second, after adapting to dim light conditions, when I blocked light to one eye as far as possible and viewed a brightly lit surface with the other eye, I perceived a swarm of colourless scintillations throughout the visual field of the occluded eye, except for an area about 1° in diameter at the centre of gaze. Each scintillation may represent the simultaneous capture of single quanta by several closely spaced rods.

Date: 1997
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DOI: 10.1038/40308

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