Optic nerve

Optic nerve
Information flow from the eyes (top), crossing at the optic chiasma, joining left and right eye information in the optic tract, and layering left and right visual stimuli in the lateral geniculate nucleus. V1 in red at bottom of image.
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optic nerve: the nerve that carries impulses from the eye to the brain.
order: a grouping of similar families.
organelles: microscopic bodies within the cytoplasm that perform distinct functions.
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Thus the optic nerve is not telling the brain simply that light has been detected but that contrast between light and dark (i.e., shape) has been detected.
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Reggie-1 and reggie-2 are two evolutionarily highly conserved proteins which are up-regulated in retinal ganglion cells during regeneration of lesioned axons in the goldfish optic nerve.
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In most vertebrates and some mollusks (such as octopuses) the eye works by projecting images onto a light-sensitive retina, where the light is detected and transmitted to the brain via the optic nerve.
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Light reaching a photoreceptor causes the breakdown of the chemical rhodopsin, which in turn causes a membrane potential that is transmitted to an action potential. The action potential transfers to synapsed neurons that connect to the optic nerve.
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OpticChiasma the place where the optic nerves cross to the other side of the brain
(opti = the eye; chiasm = cross)
Organelle the "body parts" within a cell
(organum = an instrument implement engine; -elle = small) ...
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optic chiasma
a point under the hypothalamus of the brain where the two optic nerves meet and cross over, so that a stimulus from either eye is interpreted in the optic lobe of the opposite side of the brain.
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The innermost layer of the vertebrate eye, containing photoreceptor cells (rods and cones) and neurons; transmits images formed by the lens to the brain via the optic nerve.
retinal
The light-absorbing pigment in rods and cones of the vertebrate eye.
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pecten Any of several types of comblike structures on various organisms, for example, a pigmented, vascular, and comblike process that projects into the vitreous humor from the retina at a point of entrance of the optic nerve in the eyes of all birds ...
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