(ophthalmology) The thin layer of cells at the back of the eyeball that contains rods and cones sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

plural of retina

plural of retina

(medicine) Detachment of the retina.

(ophthalmology, relational) Of or pertaining to the retina.

(biochemistry, organic chemistry) A yellow to orange aldehyde derived from vitamin A that is formed from rhodopsin by the action of light and in combination with proteins forms the visual pigments of the retinal rods and cones.

plural of retinal

(organic chemistry) retinal

plural of retinaculum

(anatomy) A connecting band. / (anatomy) One of the annular ligaments which hold the tendons close to the bones at the larger joints, as at the wrist and ankle.