visual impairments knr 270. visual impairments what is visual acuity? amount of detail that can be...
TRANSCRIPT
Visual Impairments
KNR 270
Visual Impairments
What is visual acuity? Amount of detail that can be seen Clearness
What is visual field? Entire area that can be seen at one
time with fixed eyes 180 degrees
Visual Impairments
What do you think about when you hear that someone is blind?
What do you think they see? What is your vision?
Visual Impairments
Legal blindness 20/200 in best eye with correction Or visual field of 20 degrees at the
widest point Can be legally blind and still have
some useable or functional vision Most have some functional vision Only 5% are totally blind
At 20 feet, the person with 20/20 vision sees the stop sign clearly. At 20 feet, the person with 20/40 vision sees the stop sign as if they were 40 feet away.
Visual Impairment
Congenital blindness Birth – 5 years No visual memory
After 5 years, there is visual memory that can help assist with learning
Visual Impairments
Low vision 20/70 – 20/200 30 degrees
72% of people with visual impairments are over 65 years Diabetes Cataracts Glaucoma
Blindisms
Causes
Congenital Acquired (infection) Accidents Retinopathy of prematurity (ROP)
Premature infants, 100% oxygen Detached retina
Retina detaches & rips from wall, creates blind spots Diabetic retinopathy Glaucoma
Increase pressure in eye, tunnel vision Cataracts
Opacity of lens, infants & older people Macular degeneration
Runs in families, problems with reading Retinitis pigmentosa
Inherited
Mobility
Dog guide
Only 5%
Mobility
White Cane
Purpose Identify Probe Protection
Mobility
Human (Sighted) Guide
Considerations/Accommodations
Ask how best help & about residual vision
Identify self / let know who is speaking
Speak directly to the person Use normal voice volume Introduce to group Reduce loud or disturbing
background noises
Considerations/Accommodations
Never leave alone in space Tell when leaving Place near wall, table, chair
Orient to rooms / provide tours Include restrooms, water fountains,
emergency exits, main areas Use clock or directions (N,S,W,E) Landmarks
Reduce glare / good lighting
Considerations/Accommodations
Use all senses in teaching Be descriptive Allow exploration/manipulation Keep walkways clear of obstructions Braille, larger text
Technology, Disability Concerns tour Count out change Adaptive equipment
Considerations/Accommodations
Don’t touch guide dog Use contrasting colors
Doors/walls Step edges
Know human (sighted) guide Places for dogs to potty Others????
Sports: Goal Ball
http://www.ncpad.org/competitive/fact_sheet.php?sheet=52§ion=384
Sports: Beep Baseball
http://www.nbba.org/rules/index.htm
What’s Your Bowling Preference?
Tandem Bike Riding
Fore!!!!
Outdoor Adventure
Around the Campfire
Nature Hike
Sensory Activities
Worn Out in the Wild West
Craft: Tactual Bandanas
Hayride
Games & Crafts
I’ve Never Played Bingo Before
Yum, Yum
My Horse Will Be So Cool
Is This Western Or English?
Costumes
Saying Goodbye