Intro to Low Vision Flashcards
what are the 3 most common causes of visual impairment
age related macular degeneration, glaucoma, and diabetic retinopathy
what is low vision
reduced visual acuity that is not correctable by specs, medicine or surgery
does low vision affect daily living
yes it impacts functions in daily living, occupational and academic demands
what are the clinical perimeters for low vision
best corrected VA of 20/70 to light perception and less than 20 degrees of peripheral field
what is legal blindness
best corrected VA of 20/200 or worse or peripheral vision less than 20 degrees in the better eye
what is blindness
no usable vision at all- no light perception
what is visual impairment
functional limitation of the eye(s) or visual system
what are some examples of visual impairments
reduced VA (20/70 or worse), peripheral vision loss, scotomas, diplopia, distortions, central vision loss, loss of contrast sensitivity, loss depth perception, or extreme photophobia
what is a visual disorder
anatomical changes caused by diseases of the eye- doesn’t necessarily affect function
what is a visual disability
limitations in a person’s skills and abilities (inability to read, write, drive, self-care, cooking)
what is a visual handicap
psychosocial and economic consequences of vision loss as well as environmental barriers (loss of independence, social isolation)
what are 3 categories of visual impairments
congenital, genetic, and acquired
what are some causes of congenital visual impairments
Children: prenatal, perinatal and postnatal injuries or infections, premature birth, optic nerve damage, etc.
what are some causes of genetic visual impairments
younger people: tumors, Stargardt disease, Retinitis pigmentosa, oculocutaneous albinism, aniridia
what are some causes of acquired visual impairments
adults: hemianopias, traumatic brain injuries, macular degeneration, cataracts, diabetic retinopathy
how is visual impairment different from legal blindness
visual impairment still has some usable vision- legal blindness does not
what are 2 reasons to perform vision rehab
teach patients to use their remaining vision and/or other senses effectively by modifying activities, restore vision to state of useful vision through optical devices, training, and guidence
what are some outcomes of vision rehab
maintain productive members of society, remain safe and active, increase personal independence, decrease government and family/caregiver support, and improves quality of life
list some common providers that participate in low vision care
low vision optometrist/ophthalmologist, occupational therapist, orientation/mobility instructor, vision rehabilitation therapist or low vision therapist, social worker, mental health provider, vocational rehabilitation counselor, and optometric technicians/support staff
Jeff has retinitis pigmentosa which resulted in constricted peripheral fields. He cannot travel alone & may not be able to maintain his job as a web designer
What visual impairment does he have?
constricted peripheral fields
Jeff has retinitis pigmentosa which resulted in constricted peripheral fields. He cannot travel alone & may not be able to maintain his job as a web designer
What visual disability has Jeff have?
cannot travel alone
Margaret has age-related macular degeneration. She has a blind spot in her central vision which affects her ability to read mail and bills in order to manage her finances. She is worried because she risks losing her apartment from unpaid rent.
What is the handicap associated with the vision loss?
losing her apartment (economic consequence)
Margaret has age-related macular degeneration. She has a blind spot in her central vision which affects her ability to read mail and bills in order to manage her finances. She is worried because she risks losing her apartment from unpaid rent.
What is the visual disorder?
age-related macular degeneration (eye disease)
Jerry has VA cc OD 20/150 OS LP- Peripheral field OD 150 degrees, OS 100 degrees; Is he visually impaired or legally blind
visually impaired not legally blind
John’s VA cc OD 20/20, OS 20/20
Peripheral field OD 17 degrees, OS 19 degrees; Is he visually impaired or legally blind
legal blindness based on visual field
Sherry’s VA cc OD 20/125, OS 20/80
Peripheral vision OD 150 degrees, OS 145 degrees; Is she visually impaired or legally blind
visually impaired but not legally blind
