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32 Cards in this Set

  • Front
  • Back
Retinitus Pigmentosa
Slow loss of peripheral vision
night blind to total blindness
Diabetic retinopathy
Nerves cannot feed retina
Ischemia: blood vessls serving retina
Retina detaches from the back of the eyes
Opthamalogist
MD specializing in disease and muscles of the eye
Optomotrist
Person who measures for glasses and visual acuity
Optrician
Makes and sells glasses
Definition: Legally Blind
20/200 with correction
20/20 with 20 degrees or less field vision
Rods
periphery of eye
More plentiful
Black and white, low and dimmed vision/light
Cones
Color and acquity
More plentiful in center of best vision
Broad day light
Cornea
Clear part of eye
Sclera
White part of the eye
Lens
refractive medium
relaxes and contracts
Retina
Converts to electrical enery
Light sensitive back of eye
Conjuctiva
Mucus membranes
line socket and lids
Iris
color part
open pupil to let more light in
Optic Nerve
originates at retina
Goes to brain
Optic Disc
all cells
Blind spot
Macula
general area try to get image to focus on
Mostly cones
Area of good vision
Fovia
Very center of macula
Not good for night vision
All cones centered here
Best vision in good light
Ciliary Body
set of muscles that makes lens and iris open or close
contracts and releases lens and iris
Cataracts
cloudiness/opacity of lens
all or partial replacement of lens needed
prosthesic impant
if partial cataract- may come back
seile cataract- with old age
result of trauma, surgical, heat, or system disease
presbyopia
old vision
lens doesn't refract fully anymore
hardening of lens
astigmatism
multi-focusing
irregular shaped lens or cornea
strabismus
crossed eyes
muscular imbalance between eyes
Can be corrected surgically
Hyperopia
Far sited
Focus behind retina
Distance is better
Myopia
Near sited
Focus in front of retina
Emmetropia
Proper vision with refraction
Amblyopia
lazy eye
patch is put on good eye to correct
brain confused and shuts down lazy eye
Nystagmus
involuntary side to side movements of eye
spastic
Glaucoma
#1 cause of blindness
pressure in eye due to not draining fluid
interoccular pressure
blocakge of canal of schlemm
Medications to open up- laser surgery
Problem: if not caught early -> blindness
Macular degeneration
areas of no vision
eye creates an additional blind spot
macular holes- no central vision
parapetologist
mobility instructor
low vision specialist
optomologist with specialization