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ShareThe retina is a thin layer of neural cells that lines the back of the eyeball of vertebrates and some cephalopods.
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In vertebrate embryonic development, the retina and the optic nerve originate as outgrowths of the developing brain.
Hence, the retina is part of the central nervous system (CNS).
It is the only part of the CNS that can be imaged directly.
The vertebrate retina contains photoreceptor cells (rods and cones) that respond to light; the resulting neural signals then undergo complex processing by other neurons of the retina.
The retinal output takes the form of action potentials in retinal ganglion cells whose axons form the optic nerve.
Several important features of visual perception can be traced to the retinal encoding and processing of light.
The unique structure of the blood vessels in the retina has been used for biometric identification.
For more information about the topic Retina, read the full article at Wikipedia.org, or see the following related articles:
Vitreous humour — Vitreous humour (British spelling) or Vitreous humor (US spelling) is the clear aqueous solution that fills the space between the lens and the retina ... > read more
Visual system — The visual system is the part of the nervous system which allows organisms to see. It interprets the information from visible light to build a ... > read more
Optic nerve — The optic nerve is the nerve that transmits visual information from the retina to the brain. The optic nerve is composed of retinal ganglion cell ... > read more
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Aqueous humour — The aqueous humour is the clear, watery fluid that fills the complex space in the front of the eye which is bounded at the front by the cornea and at ... > read more
Pupil — In the eye, the pupil is the opening in the middle of the iris. It appears black because most of the light entering it is absorbed by the tissues ... > read more
How internal organs form — In animal development, organogenesis is the process by which the ectoderm, endoderm, and mesoderm develop into the internal organs of the organism. ... > read more
Nervous system — The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and ... > read moreEditor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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