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Inner eye consists of:
- -the outer, middle, and inner layers.
- -outer layer: cornea and sclera
- -middle layer (uvea): choiroid, ciliary body, and iris
- -inner layer: retina (cones and rods)
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cornea
transparent interior portion, allows light into eye and focuses light on the back of the eye
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sclera
white of the eye, tough protective covering
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retina
consists of rods (low-light) and cones (bright-light).
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glaucoma
damage to the retina and optic nerve due to increased intraocular pressure, can result in blindness
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Outer eye consists of:
orbital cavity, extrinsic ocular muscles, eyelids, conjunctival membrane, and lacrimal apparatus
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Purpose of eyelids
Shield eye from light, dust, and trauma
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conjunctival membrane
thin mucous membrane lining the eyelids and the anterior part of the eye exposed to the air, providing protection and lubrication
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lacrimal apparatus
produces, delivers, and drains tears from the eye, thereby cleaning and lubricating them
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-metrist
specialist in the measurement of
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-edema
accumulation of fluid
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-iasis
abnormal condition; process
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-opia; -opsia
visual condition, vision
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difference between ophthamalogist vs. optometry vs. optician
- ophthalmologist: MD, surgery
- optometry: no MD, no surgery, study refractions
- optician: fits glasses
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the ear consists of:
the external, middle, and inner layers
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The external ear
Canal leading to the eardrum, auricle is the part of the ear external to the head
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The middle ear
the three ossicles, sound travels from eardrum to them and then to the stapes
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The inner ear
vestibule, semicircular canals, cochlea
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labyrintho
inner ear; labyrinth
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myringo
tympanic membrane; eardrum
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PERLA
pupils equal, round, react to light, accomodating
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tinnitis
ringing in the ears
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EENT
ears, eyes, nose, and throat
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ENT
ear, nose, throat; otolaryngology
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