Visual loss

Question 1

Criteria of VA for severe visual field loss?

Answer 1

3/60-6/60 or up to 6/24 with moderate field contraction
or
6/18 or better if severe visual field loss

Question 2

Criteria for severe visual impairment?

Answer 2

VA less than 3/60 or 3/60-6/60 with constricted visual fields
VA 6/60 to 6/24 with very constricted fields

Question 3

What would you do for a visual assessment?

Answer 3

aided and unaided distance visual assessment
near vision
retinoscopy 
subjective refraction
unit magnification assessment

Question 4

ddx for Low vision in children?

Answer 4

congenital glaucoma: buphthalmos 
congenital cataracts (can't replace the lens- aphakia)
diabetic retinopathy of the new born
myopia
albinism
optic atrophy

Question 5

ddx for Low vision in adults?

Answer 5

diabetic retinopathy
cataracts
uveitis 
myopia
mac degen
retinitis pigmentosa
corneal dystrophies

Question 6

presentation for retinitis pigmentosa?

Answer 6

poor vision in dull lighting and a reduction in visual fields but acuity may be fine

Question 7

ddx for Low vision in eldelrly?

Answer 7

inoperable cataracts
diabetic retinopathy/maculopathies
glaucoma
age related macular (dry and wet)