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18 Cards in this Set
- Front
- Back
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Hyperopia
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farsightedness
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Myopia
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Nearsightedness
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Astigmatism
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• Without a point
• irregular curvature of the cornea • causes irregular focusing, blurring |
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Presbyopia
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• Farsightedness of old age (mid 40s)
• loss of elasticity of muscles of lens |
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Nystagmus
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Repetitive, involuntary movements of one or both eyes
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Strabismus
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Eyes don't look in the same direction at the same time
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Convergent strabismus
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• Esotropia
• eye looks in |
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Divergent strabismus
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• Exotropia
• eye looks out |
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hordeolum = stye
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Inflammatory infections of the hair follicles of the eyelids
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Keratitis
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inflammation of the cornea
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Blepharitis
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inflammation of the eyelids
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Entropion
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eyelids turn inward
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Ectropion
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Eyelids evert from eyeball
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Conjunctivitis
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inflammation of conjunctiva
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Cateract
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• cloudy, opaque area in lens
• sx-decreased vision • ETIO- caused by deterioration of lens (aging) • tx-extracapsular surgery, center of cateract removed in one peice • tx-phacoemulsification, ultra sound probe vibrates to break up • posterior capsule is left in place new lens |
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Glaucoma
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• Common and serious disease
• increased intraocular pressure causes damaged to optic nerve • atrophy of optic nerve and blindness • ETIO- malfunction of the drainage system of the eye causing increased intraocular pressure • channels that drain fluid from eye do not do so properly • dx- tonometry • tx-meds for open angle, laser • tx- surgery for acute |
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Macular degeneration
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• area near the optic nerve
• area degenerates • sx-loss of central vision • ETIO-age related, decreased amount of blood supply to area • no cure known; vitamins a,d,e and zinc can slow deterioration |
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diabetic retinopathy
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• Sx-microaneurysm, hemorrhages, dilation of veins, new vessels form
• affects sharpness and clarity of vision • major cause of blindness • ETIO-scar tissue forms on retina, caused by high blood sugars • tx-surgery |
