Retinas

Retina
Right human eye cross-sectional view, eyes vary significantly among animals.
Details
Artery	central retinal artery
Identifiers
Latin	Rēte
MeSH	A09.371.729
Dorlands /Elsevier	Retina
TA	A15.2.04.002
FMA	58301
Anatomical terminology []

The retina (UK /ˈrɛtɪnə/ RET-i-nə, US /ˈrɛtnə, ˈrɛtənə/ RET-(ə-)nə, pl. retinae, /ˈrɛtiniː/; from Latin rēte, meaning "net") is the third and inner coat of the eye which is a light-sensitive layer of tissue. The optics of the eye create an image of the visual world on the retina (through the cornea and lens), which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical events that ultimately trigger nerve impulses. These are sent to various visual centres of the brain through the fibres of the optic nerve. Neural retina typically refers to three layers of neural cells (photo receptor cells, bipolar cells, and ganglion cells) within the retina, while the entire retina refers to these three layers plus a layer of pigmented epithelial cells.