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64 Cards in this Set
- Front
- Back
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three layers of the eye
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sclera, choroid, retina
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transparent part of the sclera
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cornea
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extension of the cornea
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lens
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ability of the lens to change shape
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accommodation
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cavity in front of the lens
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anterior cavity
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liquid in the anterior cavity
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aqueous humor
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cavity behind the lens
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posterior cavity
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liquid in the posterior cavity
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vitreous humor
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when the vitreous builds up and cant drain
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glaucoma
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when the lens has lost its ability to change shape
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presbyopia
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Loss of hearing
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presbycusis
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Layer of blood vessels
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Choroid
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The substance under the choroid that makes your pupil look black
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Melanin
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pigmented portion of our eye in the middle of the choroid
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the iris
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A net of specialized nerve cells that are stimulated by light rays.
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retina
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rods vs. cones
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Rods - detects shades of light, not color.
Cones - makes you see color, red blue and green cones |
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Responsible for central vision
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macula lutea
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Outside the macula
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Peripheral vision
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Pit in the macula lutea
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Fovea centralis- point of sharpest visual accuity
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Outside the macula
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Only rods
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collection of axons from all the photo receptor cells in the retina.
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Optic nerve
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Point at which the optic nerve leaves the eyeball
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Optic disc, "blind spot"
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T or F the cornea changes shape
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F
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nearsightedness
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myopia
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farsightedness
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hyperopia
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eye chart
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snellen
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person cant see color
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color blindness
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test for color blindness
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Ishihara
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Defect in the curvature of the cornea
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astigmatism
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eyeball doesn’t stay steady, wiggles.
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nystagmus
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If the eye is off the “line.” Aligned right or left.
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Strabismus
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cross eyed
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Esotropia
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Where the eye is pointing outward. A type of strabismus
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Expotropia
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weakness in the vision of one eye that is otherwise normal. “lazy eye.”
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Amblyopia
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“Weak eyes.” Eye strain
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Asthenopia
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The visible part of the ear
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Pinna / auricle
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The three parts of he pinna
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Lobe, tragus, myringa
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three parts of the outer ear
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Pinna
External auditory canal / meatus Eardrum / tympanum |
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three bones connected to the tympanum
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auditory ossicles
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the auditory ossicles in order
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Malleus / hammer (outer)
Incus / anvil Stapes / stirrup |
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ossification of the ossicles. Impairs one’s hearing
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Otosclerosis
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a diminution of hearing due to age.
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Presbycusis
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Extension of the middle ear cavity above the ossicles
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Antrum
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Lower extention of the middle ear cavity becomes the
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Eustachian tube
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controls pressure in the middle ear
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Eustachian tube
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What's the inner ear calld
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labyrinth
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Two parts of the labyrinth
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Chochlea, vestibular apparatus
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The chochlea goes down and around and ends up where?
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fenestra ovalis
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flulid inside the chochlea
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endolymph
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The true organ of hearing- strip of tissue in the cochlea
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organ of Corti
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8th cranial nerve
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chochlear nerve or auditory nerve
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what's responsible for equilibrium?
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vestibular apparatus
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two pouches below the semi-circular canals of the vestibular apparatus
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saccule and the utricle
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The semicircular canals convey information about
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rotational movement
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The saccule and the utricle convey information about
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up and down, front and back, side to side movement
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little stones on top of this bulb covered with jellly at the end of the saccule
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Otoliths
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Allows sound waves to escape from the cochlea into the middle ea
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round window
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smallest striated muscle in the body. Attached to the stapes. Stabilizes the stapes. Prevents over vibration of the stapes.
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stapedius
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a condition of heightened sound
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hyperacusis
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ringing in the ears. Symptom
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Tinnitus
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loudness of the sound. Measured in decibels
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amplitude
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sharpness of the sound. High or low. (frequency measured in Hertz) determined how frequently the sound waves pass over a point.
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pitch
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qulity of the sound
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timbre
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ear, nose, and throat doctorq
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Otorhinolaryngologist
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