NURSE-UN 1435 Midterm: RP Patho Study Guide - Material for Exam 2 & Final - copy
24 Oct 2018
School
Department
Course
Professor
Document Summary
3 types of issues: errors of refraction, hyperopia, myopia, presbyopia, astigmatism, eye movement impairment, strabismus, amblyopia, diplopia, nystagmus, structural impairment, glaucoma, cataracts, macular degeneration. Refraction eyes unable to accommodate/focus: hyperopia: farsighted, can"t see close up, a:p dimension of eyeball is too short, uses convex lenses. Image focuses behind retina: myopia: nearsighted, can"t see far away, a:p dimension is too long, uses concave lenses. Image focuses in front of retina: presbyopia: aging, lens is less flexible, difficult to read up close. Glaucoma increase intraocular pressure damage of optic nerve (optic disc cups and can damage nerves: causes: decreased aqueous production decreased outflow of eye fluid, congenital vs. acquired. 1* w/o preexisting eye problems or 2* resulting from another inflammatory process, tumors, or hemorrhage. Macular degeneration affects fovea in back of eye (central part of retina) blindness: where vision signals come & get sent to brain via optic nerve.
