Pediatric eye examination
Age | Type of test | Example of test
|
3-12 months | Preferential looking | Keeler cards
|
1-3 years | Vanishing optotypes (looking and/or
naming)
|
Cardiff cards |
2.5 – 4 years | Single or crowded letter or picture
matching
|
Sheridan Gardner at 3 or 6 metres logMAR or Kay crowded pictures
|
4-6 years | Crowded letter matching or naming | logMAR crowded, Snellen, Sonksen
Silver
|
Approximate visual acuity according to age
Age Approximate
|
Snellen acuity |
Birth
|
6/300 |
1 month
|
6/200 – 6/90 |
3 months
|
6/90 – 6/60 |
6 months
|
6/36 – 6/30 |
9 months
|
6/24 |
1 year
|
6/18 |
18 months
|
6/12 |
2 years
|
6/12 – 6/9 |
3 years
|
6/9 – 6/6 singles |
4 years
|
6/9 – 6/6 crowded |
5 years | 6/6 – 6/5 |
Tests to measure near acuity
Age | Type of test | Example of test | Near acuity at 25cm
|
2-3 years | Picture Naming | Reduced Kay pictures | 6/12 – 6/6
|
3-5 years | Matching singles | Reduced single Snellen | 6/9 – N5
|
4-6 years | Naming reduced letter
charts
|
Snellen, logMAR | 6/6 or N5
|
5 years onwards | Reading | McClure reading book | 6/6 or N5
|