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

When they did so, the early retinal damage did not occur and normal eye function was preserved.

From Science Daily • Mar. 7, 2026

"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 • Jan. 12, 2026

In November, the Food and Drug Administration approved the drug for use in patients with macular edema following retinal vein occlusion, a condition where leaky blood vessels in the eye cause swelling.

From Barron's • Jan. 7, 2026

But myopia also increases the risk of cataracts, glaucoma, retinal detachment and other eye diseases later in life.

From The Wall Street Journal • Dec. 28, 2025

A thin robotic arm extended a circular device that looked like a retinal scanner, which locked into place directly level with the pupil of my right eye.

From "Ready Player One: A Novel" by Ernest Cline