retinal : Idioms & Phrases
retinal cone
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noun a visual receptor cell in the retina that is sensitive to bright light and to color
cone cell; cone.
WordNet
retinal detachment
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noun visual impairment resulting from the retina becoming separated from the choroid in the back of the eye; treated by photocoagulation
detached retina; detachment of the retina.
WordNet
Retinal purple
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noun a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
visual purple; rhodopsin.
WordNet
(Physiol. Chem.) , the visual purple.
Webster 1913
retinal rod
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noun a visual receptor cell that is sensitive to dim light
rod cell; rod.
WordNet
retinal scanning
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noun biometric identification by scanning the retina of the eye
- identification by retinal scanning is complicated by eye movements