# retina

/ˈɹɛtənə/ (US) · /ɹˈɛtɪnɐ/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/retina
Updated: 2026-05-06

## Definition

the thin layer at the back of your eye that catches light. It sends signals to your brain so you can see images.

For teachers: the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.

## Examples

- The doctor looks at your retina during an eye exam.
- Light enters the eye and hits the retina, where it is converted into electrical signals for the brain.
- Advanced imaging techniques now allow ophthalmologists to examine the delicate layers of the retina in high resolution, facilitating the early detection of degenerative conditions.

## Usage notes

- Commonly used in medical or biological contexts; often appears in the singular when referring to one eye.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.