Module 14 Special Senses Flashcards
Otitis media
inflammation of the middle ear possibly caused by bacteria or virus; could be acute or chronic; treatment: antibiotics, analgesics, myringotomy (needle aspiration to drain built-up fluid), and surgery
cataract
opacity or clouding of the crystalline lens or its surrounding membrane of the eyeball; unilateral or bilateral; occur as part of the aging process; treatment: glasses, phacoemulsification (surgery
opthalmologists
MDs in the diagnosis and treatment of diseases of the eye
optician
licensed to make corrective lenses, adjust and repair spectacles, and fit contacts
otologist
medical specialists in diseases of the ear
otorhinolaryngologists
MDS in diseases of the ear, nose, and throat (ENT)
conjuctiva
inner lining of the eyelids
orbit
the bony socket that holds the eyeball
photophobia
fear of the light because it hurts the eyes
hordeolum
aka stye
chalazion
small, painless, localized, whitish swelling inside the lid when a tarsal gland becomes blocked
blepharitis
multiple eyelash follicles and tarsal glands become infected; usually staphylococcal
dacryostenosis
blockage of the drainage of tears, usually due to narrowing of the nasolacrimal ducts
dacryocystitis
infection of the lacrimal sac with swelling and pus at the medial corner of the eye
ptosis
upper eyelid is constantly drooped over the eye due to paresis of the muscle that raises the upper lid
stereopsis
three-dimensional perception
strabismus
a turning of an eye away from its normal position due to eye and brain not cooperating
esotropia
eye turned in toward the nose
exotropia
outward turning of one eye
ambylopia
“lazy eye”; failure or incomplete development of the pathways of vision to the brain
sclera
fibrous outer covering of the eyeball and the white of the eye
cornea
dome-shaped membrane on the front of the eye
sphincter pupillae muscle
opens and closes the pupil dictating how much light is let in
ciliary body
muscles that make the lens of the eye thicker and thinner
iris
colored portion of the eye with the pupil in its center
lens
transparent refractive structure behind the iris
retina
light-sensitive lining at the back of the eye; has 130mil rods which perceive only light and 6.5mil cones which are activated by light and color and have precise visual acuity