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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
Sclera |
•thick, white tissue that,covers the outermost part of the eyeball _"white of the eye" •central, anterior portion is clear |
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Cornea |
•transparent window through which light enters the eye |
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Choroid |
•middle coat of the eyeball •prevents light from scratering inside of the eye |
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Iris |
•band of muscles that control the size of your pupil •pigment in iris determines the color of your eyes |
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Lens |
•focuses light entering the eye on the retina •cataracts _lens get hard&opaque causing it to not be able to focus light as well resulting in hazy vision&eventually blindness |
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Pupil |
•opening in the iris that regulates the amount of light that passes into the eye _contricts: close vision&bright light _dilates:far vision&dim light |
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Nearsighted |
•lens doesn't focus light correctly on retina _(myopia) distance objects appear blurry _point at focus before retina |
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Farsighted |
•lens doesn't focus light correctly on retina _near objects appear blurry _point of focus behind retina |
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Retina |
•innermost area •contains photoreceptor cells that respond to light _cones _rods |
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Rods |
•photoreceptor •allow us to see gray tones •provide for peripheral vision |
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Cones |
•photoreceptor •3 variates _red,green,blue •allows us to see colors •color blindness:cause by lack of cone type |
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Optic nerve |
•photoreceptors transfer message they receive from light to the optic nerve •optic nerve sends message to brain _result in vision •Blind spot: _location where optic nerve leaves eyeball(optic disk) _no photoreceptors |
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Aqueous humor |
•anterior to the lens •clear watery fluid •help maintain pressure inside the eye so it doesn't collapse inward •glaucoma:aqueous humor is blocked from draining and increases the pressure in the eye and compresses the retina to the lens |
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Vitreous humor |
•posterior to the lens •gel like •helps maintain pressure inside The eye so it doesn't collapse inward |
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G |
G |
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