Eye & Vision
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| lacrimal gland | produces tears and released them on the anterior surface of the eyeball through several small
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| conjunctiva | membrane that lines the eyelids and outer surface of the eyeball; connects to the outer surface of the eye; secretes mucus to lubricate the eye and keep it moist
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| optic nerve | sensory nerve that sends vision impulses to the brain
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| lacrimal sac | provides passage of tears towards nasal cavity
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| nasolacrimal duct | empties tears into the nasal cavity
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| lacrimal canaliculus | drain tears from eyes medially
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| eyelid | meet at the medial and lateral corners or commissures; palpebral fissure is the space between the eyelids in an open eye; medial commissure is at the inner corner of the eyelid; lateral commissure is at the outer corner of the eyelid
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| vitreous humor | filled with a gel-like substance
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| retina | delicate two-layered; extends anteriorly to the ciliary body
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| lens | focuses the light coming in the eye; held in place by a ligament (ciliary zonule)
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| ciliary body | smooth muscle that attaches to the lens in the eye
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| aqueous humor (in anterior segment) | contains a clear watery fluid
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| tarsal glands | produce an oily secretion that lubricates the eye
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| emmetropic eye | "harmonious vision"; eye focuses images correctly on the retina; no need for corrective lenses
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| myopia | "short vision"; nearsightedness; occurs when eyeball is too long, too strong, or cornea is too curved; requires concave corrective lenses
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| cornea | transparent, central anterior portion; allows for light to pass through; repairs itself easily; only human tissue that can be transplanted w/o fear of rejection bc it has no blood vessels so the immune system can't reach it
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| hyperopia | "far vision"; farsightedness; occurs when eyeball is too short or forms a "lazy" lens; requires convex corrective lenses
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| iris | regulates amount of light entering eye; pigmented layer that gives eye color
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| choroid | a blood-rich nutritive tunic that contains a dark pigment
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| sclera | white connective tissue layer; seen anteriorly as the "white of the eye"
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| ciliary zonule | the ligament that attaches the lens to smooth muscle
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| pupil | rounded opening the iris; black part
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| eyelashes | project from the border of each eyelid
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Created by:
kajones97
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