Visual impairments
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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?

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Visual impairments

Visual Impairments

KNR 270


Visual impairments1

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 impairments2

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 impairments3

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


Visual impairments

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

Visual Impairment

  • Congenital blindness

    • Birth – 5 years

    • No visual memory

  • After 5 years, there is visual memory that can help assist with learning


Visual impairments4

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

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


Mobility1

White Cane

Purpose

Identify

Probe

Protection

Mobility


Mobility2

Human (Sighted) Guide

Mobility


Considerations accommodations

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 accommodations1

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 accommodations2

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 accommodations3

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

Sports: Goal Ball

  • http://www.ncpad.org/competitive/fact_sheet.php?sheet=52&section=384


Sports beep baseball

http://www.nbba.org/rules/index.htm

Sports: Beep Baseball


What s your bowling preference

What’s Your Bowling Preference?


Tandem bike riding

Tandem Bike Riding


Visual impairments

Fore!!!!


Outdoor adventure

Outdoor Adventure


Around the campfire

Around the Campfire


Nature hike

Nature Hike


Sensory activities

Sensory Activities


Worn out in the wild west

Worn Out in the Wild West


Craft tactual bandanas

Craft: Tactual Bandanas


Hayride

Hayride


Games crafts

Games & Crafts


I ve never played bingo before

I’ve Never Played Bingo Before


Yum yum

Yum, Yum


My horse will be so cool

My Horse Will Be So Cool


Is this western or english

Is This Western Or English?


Costumes

Costumes


Saying goodbye

Saying Goodbye


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