words worth knowing- structure of the eye

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Lernen beginnen

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Frage		Antworten
sclera Lernen beginnen		opaque, white covering that surronds the eye, and gives the eye its shape
cornea Lernen beginnen		clear covering in front of the pupil and the iris
lacrimal glands Lernen beginnen		tear glands; help to nourish the cornea
iris Lernen beginnen		circular muscles that surround the eye, contractions and relaxations help regulate light entering the eye
pupil Lernen beginnen		an opening in the eye that absorbs the light
ciliary muscles Lernen beginnen		musles that relax and contract to change shape of the lens, adgustments are called ACCOMADATING
aqueous humor Lernen beginnen		liquid produced by the the Anterior Chamber to clean and nourish the cornea
lens Lernen beginnen		convex shaped disc and it is held in place by the ciliary muscles
vitreous humor Lernen beginnen		gel like substance that surround the les to protect it
retina Lernen beginnen		the back of the eye, contains photoreceptors that detect light
optic disk Lernen beginnen		the entrance point of the optic nerve
blind spot Lernen beginnen		the optic disk has no photorecepters, therefore creating a blind spot in the vision
optic nerve Lernen beginnen		nerves that send the informationcollected by the eye to the brain
choroid Lernen beginnen		connectibe tissue that lies between the retina and the sclera
macula Lernen beginnen		area in the center of the retina that is responsible for high acuity in the center of our vision
fovea Lernen beginnen		dimple in the retina that has 100% accurate vision because it consists only of cone cells

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