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62 Cards in this Set
- Front
- Back
colored part of the eye
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iris
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white of the eye
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sclera
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mucous memebrane provides a barrier envionment & nourishes the eye
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conjunctiva
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outermost edge of the iris where conjunctiva meets cornea
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limbus
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transparent domelike structure , main refracting surface of the eye
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cornea
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behind cornea, filled with aqueous humor,
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anterior chamber
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directly behind the pupil
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lens
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consists of , iris, cilliary, and choroid
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Uvea
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dilates and constricts in response to light
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pupil
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Vistreous humor
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posterior of lens, contains ocular fundus
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innermost surface of the ocular fundus
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retina
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responsible for night vision
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rods
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best vision for bright light, color and fine
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cones
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retina, optic nerve, optic chiasm, optic tracks
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retinal pathway
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what is blindness
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BCVA of 20/400 to no light perception
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nearsighted
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myopia
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farsighted
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hyperopia
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irregular curve of cornea
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astigmatism
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normal eyesight
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emmetropia
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optic nerve damage related to increased IOP- leading to irreversible blindness
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glaucoma
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avoid use of what? in patients with glaucoma
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goldenseal
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lens of the eye becomes opaque
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cataracts
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seperation of the RPE from the sensory layer
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retinal detachment
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most common cause of visual loss for over 60years age
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macular degeneration
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most common eye infection
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conjunctivitis
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acute staoh infection of the glands of the eyelid
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hordeolum (sty)
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increase aqueous flow
s/e blurry vision warn pt be careful in dim areas |
choinergic (miotic-pilocarpine)
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type of meds ..decreased aqueous production and increase the flow
s/e increase b/p |
adrenergic agonists (dipivefrin, epinephrine)
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decrease aqueous humor production
s/e bradycardia and hypotension contraindicated in COPD, asthma |
beta blockers (betaxolol, timolol)
alpha-adrenergic agonists |
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increase uveoscleral outflow
s/e darkening of iris, rash |
prostaglandin ( latanaprost)
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dilates pupils
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mydriatics
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leading cause blindness in diabetics
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diabetic retinopathy
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excess of ? blocks ear canal and impairs hearing
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cerumen impaction
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tx cerumen impaction
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Ceruminolytic agents and lavage
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inflammation of the middle ear, common cause of temporary conductive hearing loss.
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otitis media
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tx otitis media
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topical heat and systemic analgesics and antibiotics for bacterial infection.
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surgical tx otitis media
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myringotomy
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[incision is made in the eardrum & fluid is aspirated. A polyethylene tube may be placed in the ear drum to equalize pressure & allow for drng.]
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myringotomy
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inflammation c edema, dischg, and erythema. Moisture in ext ear usually referred to as swimmers ear.
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external otitis media
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inflammation of the inner ear (cochlear or vestibular portion) Sx- vertigo, tinnitus and sensorineural hearing loss on the affected side. Rare condition since the use of antibiotics. Destruction of cochlea or labyrinth cause permanent deafness
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Labyrinthitis
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sensorineural hearing loss associated with aging. Loss of higher frequency sounds related to degenerative changes in the inner ear, loss of hair cells, reduction of blood supply
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Presbyacusis
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Most common conductive hearing loss, occurs because of pathologic changes in the bones of the middle ear
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Otosclerosis
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tinnitus and vertigo, treated with anithistamines, antiemetics, benzodiazepines, diuretics, tranquilizers, vasoactive agents, and oral niacin...May cause perm. hearing loss.
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Meniere’s disease
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Loss of central vision related to atrophy or deterioration of the macula. Peripheral vision remains. Associated with aging.
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macular degeneration
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the point on the retina where light rays meet as they are focused by the cornea & lens of the eye.
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macula
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lens loses its transparency and/or becomes opaque. Associated with aging, but may be congenital, caused by eye injury or secondary to metabolic problems such as diabetes mellitus. Surgical removal and insertion of intraocular lens.
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cateracts
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changes in the retina due to poorly controlled diabetes. It is the leading cause of vision loss in adults under age 40. Sx; retinal edema & hemorrhage & leads to gradual blurring and may progress to blindness. Prevention = yearly eye exam
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retinopathy
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burning, prickling, tingling sensation.
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paresthesia
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test that assesses for balance
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romberg test
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tests visual acuity
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snellen chart
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for profoundly deaf. Requires postoperative training and rehabilitation for use.
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cochlear implants
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in high does cause transient or permanent hearing loss.
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osmotic diuretics
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measurement of intraocular pressure. Elevated pressure reveals glaucoma.
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tonometry
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test using tunning fork placed at the top of the head. Equal vibrations should be heard in both ears. In conduction deafness vibration will be best heard in the affected ear. In sensorineural loss the sound is heard in the unaffected ear.
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weber
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use of tuning fork placed against the mastoid process and near the ear to assess hearing. Conductive hearing loss if the bone conduction of sound is greater than air conduction.
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rinne test
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inability of the eyes to focus in the same direction
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strabismus
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profoundly deaf have greater than ? dB [usually congenital defect]
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91 db
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abnormality in the heel strike through push-off action.
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Antalgic gait
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Sensory receptors within the body regarding spatial position and muscular activity
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Proprioceptors
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associated with aging when the elasticity of the lens of the eye is lost. Near vision is lost but far vision remains the same
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Presbyopia
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type of glaucoma...has a gradual rise in intraocular pressure, slow progressive loss of peripheral vision.
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open angle
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type of glaucoma...sudden attacks of increased intraocular pressure with a bulging iris which is an emergency situation
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closed angle
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