What does retina mean?
The retina is the light-sensitive membrane at the back of the eye. Its rods and cones detect light and convert it into electrical signals, which are processed by the brain into images of colour, shape, movement, and depth. Retinal health is important because damage to this tissue can impair vision and may lead to blindness. The word is also used in descriptions of digital displays, as in a high-resolution retina display. Anatomically, the human retina is an intricate layer containing photoreceptors, nerve fibres, blood vessels, and supporting cells. Although the term is technical, it is widely understood in medical contexts and in discussions of eyesight and screen technology. In general use, “retina” specifically refers to the inner surface of the eye rather than to the whole organ.
nounThe retina is the light-sensitive layer of tissue lining the inner part of the eye, containing the rods and cones that convert light into nerve signals.
- The light-sensitive inner layer of the eye that contains photoreceptor cells and sends visual information to the brain.
"The doctor examined the retina for signs of damage caused by diabetes."
"Damage to the retina can result in blurred or lost vision."
"The retina displays the image upside down, but the brain interprets it correctly."
Also written as retinae, particularly in medical and anatomical contexts.
"The condition can affect both retinas."
At the back of the eye, a thin sheet of living tissue captures light and begins the complex work of turning the world into vision.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does retina come from?
The word entered English in the late Middle English period through Old French, from Latin retina. The Latin word is commonly connected with rete, meaning “net,” possibly in reference to the netlike arrangement of the eye's internal structures, although the precise ancient derivation is uncertain. Later scientific usage established the anatomical sense, and medical terminology produced derivatives such as retinitis and retinopathy.
Related word forms
How retina is actually used
In medicine and anatomy, the term is commonly used in combinations such as retinal detachment, retinopathy, and retinitis. It is also used figuratively in computing to describe a screen or display.
Easily confused with retina
The retina is a layer of the eye, whereas a refrain is a repeated phrase in a poem, song, or musical passage.