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

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

Andy was born with retinal dystrophy, an inherited condition causing progressive vision loss, which eventually leads to tunnel vision and potentially blindness.

From BBC

"You certainly shouldn't ignore the symptoms of retinal detachment, because it can lead to loss of vision, and if it's left too late, it may be difficult to recover that vision," he said.

From BBC

"Stem cell-derived retinal implants may offer one of the greatest possibilities for helping patients with dry age-related macular degeneration and one day, may offer a cure."

From Science Daily