Vision Impairment Flashcards
vision categories
legally blind
vision impairment
low vision
legally blind
condition of lacking visual perception due to neurological or physical factors
visual acuity of <20/200 with correction
widest angle of visual field is <20 degrees
vision impairment
visual acuity of 20/200 to 20/70 in the best eye
slight defects in field of vision
partial or complete loss of vision
low vision
uncorrectable vision loss that negatively impacts patients level of functioning
usually partial vision
most commonly found in elderly
social impact of visual impairment
unemployment
poor access to rehabilitation
social isolation
assistance with daily activities
factor driving vision loss crisis
population aging
age related macular degeneration
incurable, progressive condition that involves the deterioration of the macula
patients lose central vision, difficulty seeing faces, difficulty performing everyday tasks
vision loss can be permanent related
age related macular degeneration risk factors
age
race
smoking
sunlight
nutrition
dry AMD
more common
fatty debris accumulation and other degenerative changes in macula
slow progression of vision loss
wet AMD
more severe form
blood and fluids leak into macula from abnormal blood vessels and scar tissue formed
rapid vision loss
glaucoma
group of disorders that involve progressive loss of optic nerve cells
may result in permanent vision loss
commonly associated with elevated intraocular pressure
glaucoma risk factors
age
race
intraocular pressure
diabetes
family history
hypertension
open-angle glaucoma
more prevalent
subtle initial symptoms, allows disease to go undetected until permanent loss of vision
angle-closure glaucoma
pronounced symptoms (pain and sudden change of vision)
acute presentation is medical emergency
cataracts
opacification of crystalline lens of eye causes lens to become cloudy
impairs vision by inhibiting light transmission
reversible vision loss
