paedeatrics Flashcards
(13 cards)
why do we want to see young children?
better to diagnose early to treat better
amblyopia
- poor vision in an apparently healthy eye
- caused by squint, refractive error, dropping eyelid (ptosis)
- prevalence is about 3%
- treated by removing any barrier or patching and correcting refractive error
- treatment unlikely to work after 7
- only a third of cases are resolved by treatment
squint - strabismus
- prevalence ab 3%
- eyes are misaligned
- associated with long sight so if glasses worn early may not be permanent
refractive errors
-6% of children have eye correction
w down’s syndrome= 60%
- celebral palsy= 52%
squint
-3% of children have it
down’s syndrome is about 28 percent
- celebral palsy- 54%
uncorrectable vision
- down’s syndrome=100%
- celebral palsy=25%
resolution acuity
resolving the difference between two gaps
recognition acuity
able to identify a target
teller cards
birth to 12 months
measures resolution acuity
made of gratings that become increasingly thinner
get baby to look to where the patterns are and gets thinner and thinner
VA recorded as last grating patient saw 75% which basically means how many times they get it right eg if it’s 3 out of 4 times
keeler cards
same as teller but gratings are in circular shapes instead
cardiff acuity cards
12 months to 2.5 yrs
measures resolution acuity
made of vanishing optotypes
watch the patients eye movements
practitioner does not know where the picture is
VA is the last card the patient saw 2 out of 3 times
crowded kay pictures
and
Lea crowded symbols
2 to 4 years
measures recognition acuity
picture matching and naming
patient uses matching card to match picture or names them
AVAILABLE AS SINGLE PIC FORMAT
Sonksen logMAR test
and
keeler logMAR test
3 plus years
measures recognition acuity
letter matching and naming
patient uses matching card to match the letters or name them
keeler: same test but has two booklets where one booklet has crowded letters
