Visual Impairments Flashcards
a bilateral visual impairment that cannot be corrected by corrective lenses, medication or surgery
low vision
a progressive and irreversible loss of central vision caused by fibrous scarring or atrophy of the macula - 2 types
Age Related Macular Degeneration
What are the 2 types of macular degeneration?
wet & dry
Rapid growth of small blood vessels under macula.
wet macular degeneration
age-related, yellowish deposits under macula
dry macular degeneration
Cloudy or blurry vision in the lens cause by build up of protein. This prevents light from being focused clearly on the retina, which can impair your vision.
cataracts
the abnormal growth of small blood vessels in the retina causing swelling or bleeding which can lead to serious vision loss.
diabetic retinopathy
Damage to the optic nerve due to increased intraocular pressure results in deceased peripheral vision. Eventually central vision experiences deficits as it shrinks.
glaucoma
the ability of the eyes to move smoothly and with coordination through full range of motion
ocular motility
lens loses elasticity (ability to focus on near tasks), turns yellowish (color discrimination affected)
presbyopia
What is Warren’s hierarchy for addressing visual dysfunction?
1) visual cognition (HIGHEST LEVEL)
2) visual memory
3) pattern recognition
4) scanning
5) attention
6) oculomotor control, visual fields, visual acuity (LOWEST LEVEL)
misalignment of eye resulting from extra ocular muscle weakness after stroke/other neurological insult
strabismus
What are some symptoms of strabismus?
double vision
patching the eye to eliminate double vision
occlusion
lack of awareness of one half of a person’s visual space
hemi-inattention or hemi-neglect
