Low vision and Visual Rehab Flashcards
What are causes of paediatric low vision
Congenital Cataracts
Optic atrophy
Albinism
Buphthalmos
what is Buphthalmos
increased IOP due to blockage of aqueous drainage during development causing large iris/pupil leading to decreased vision
who should low vision be reported to if found in a child
local school and council educationdepartment
what is the age split of low vision patients `
5% kids
95% adults - 75% of which are >65
what are the main causes for low vision in adults
Diabetic Retinopathy Myopia uveitis corneal dystrophies macular degenerations retinitis pigmentosa
what is retinitis pigmentosa
breakdown in retinal tissue causing poor vision inn dull lighting and decreased visual field
what are the main causes of low vision in retired/eldely people
Macular degeneration
Glaucoma
inoperable cataracts
Diabetic Retinopathy
What are the components of a visual assessment
Distance vision retinoscopy subjective refraction (patients opinion on lens power) near vision assessment unit magnification assessment
what form is filled out if an optometrist finds low vision
GOS 18 form
what is an optometrist legally obliged to do following an appointment
write to the patients GP
what are these specific referrals:
LVI
RVI
CVI
LVI - letter of visual impairment
RVI - Referral of visual impairment
CVI - certificate of visual impairment
what acuity measures count as visual impairment
3/60 - 6/60 OR
6/24 with moderate field contraction OR
6/18 with severe field loss
what is the definition of SEVERE visual impairment and what acuity/visual field defect is required for this definition
Too visually impaired to perform work where sight is essential
<3/60-6/60 with constricted fields
6/60-6/24 with very constricted fields
