retina
Sign in to saveThe retina (; or retinas) is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which then processes that image within the retina and sends nerve impulses along the optic nerve to the visual cortex to create visual perception. The retina serves a function which is in many ways analogous to that of the film or image sensor in a camera.
AI overview
The retina is a light-sensitive layer of tissue lining the inside of your eye that captures visual information from the world around you. It processes the image it receives and sends signals through the optic nerve to your brain, allowing you to see.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Anatomy.Name
- Retina
- Anatomy.pronunciation
- ,,pl. retinae
- Anatomy.Latin
- rēte, tunica interna bulbi
- Anatomy.Image
- Human eye cross-sectional view grayscale.png
- Anatomy.Caption
- Right human eye cross-sectional view; eyes vary significantly among animals.
- Anatomy.part_of
- Eye
- Anatomy.System
- Visual system
- Anatomy.Artery
- Central retinal artery
via Wikipedia infobox
Article
22 sectionsContents
- Structure
- Inverted versus non-inverted retina
- Retinal layers
- Layers imagable with optical coherence tomography
- Development
- Blood supply
- Energy requirements
- In birds
- Biometric identification and diagnosis of disease
- Function
- Spatial encoding
- Clinical significance{{anchor|Diseases_and_disorders}}
- Diagnosis
- Treatment
- Common treatment modalities
- Uncommon treatment modalities
- History
- Additional images
- See also
- References
- Further reading
- External links
The retina (; or retinas) is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which then processes that image within the retina and sends nerve impulses along the optic nerve to the visual cortex to create visual perception. The retina serves a function which is in many ways analogous to that of the film or image sensor in a camera.
The neural retina consists of several layers of neurons interconnected by synapses and is supported by an outer layer of pigmented epithelial cells. The primary light-sensing cells in the retina are the photoreceptor cells, which are of two types: rods and cones. Rods function mainly in dim light and provide monochromatic vision. Cones function in well-lit conditions and are responsible for the perception of colour through the use of a range of opsins, as well as high-acuity vision used for tasks such as reading. A third type of light-sensing cell, the photosensitive ganglion cell, is important for entrainment of circadian rhythms and reflexive responses such as the pupillary light reflex.