retinal

¹ American  

[ret-n-uhl] / ˈrɛt n əl /

adjective

1. of or relating to the retina of the eye.

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retinal ² American  

[ret-n-al, -awl] / ˈrɛt nˌæl, -ˌɔl /

Also retinene

noun

Biochemistry.

1. an orange pigment, C 2 0 H 2 8 O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.

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Etymology

Origin of retinal¹

First recorded in 1830–40; retin(a) + -al ¹

Origin of retinal²

First recorded in 1940–45; retin(a) + -al ³

Example Sentences

Severe myopia increases the risk of cataracts, glaucoma and retinal detachment later in life.

From The Wall Street Journal

The findings, published in Science Translational Medicine, point to a protein called LRG1 as a key factor that triggers the earliest stage of retinal damage after diabetes develops.

From Science Daily

The device converts light into electrical signals that stimulate surviving retinal cells.

From Science Daily

The research team analyzed retinal tissue from 104 people using advanced imaging, genetic testing, and protein studies.

From Science Daily

If lighting is too dim and the pupil narrows excessively at short viewing distances, retinal activity may not be strong enough to support normal visual development.

From Science Daily