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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

Cornea

•transparent window through which light enters the eye

Choroid

•middle coat of the eyeball


•prevents light from scratering inside of the eye

Iris

•band of muscles that control the size of your pupil


•pigment in iris determines the color of your eyes

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

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

Nearsighted

•lens doesn't focus light correctly on retina


_(myopia) distance objects appear blurry


_point at focus before retina

Farsighted

•lens doesn't focus light correctly on retina


_near objects appear blurry


_point of focus behind retina

Retina

•innermost area


•contains photoreceptor cells that respond to light


_cones


_rods

Rods

photoreceptor


•allow us to see gray tones


•provide for peripheral vision

Cones

photoreceptor


•3 variates


_red,green,blue


•allows us to see colors


•color blindness:cause by lack of cone type

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

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

Vitreous humor

•posterior to the lens


•gel like


•helps maintain pressure inside The eye so it doesn't collapse inward

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