| Recommended
Age Range |
Test
Type |
Optotype
Available |
| 6
months to 3 years |
Acuity |
Cardiff,
Lea Gratings®,
Richman, Teller |
| Contrast |
Cardiff,
Hiding Heidi |
| 3
to 5 years |
Acuity |
Allen,
HOTV, Lea Symbols, Cardiff Near, Kay Pix, Cambridge |
| Contrast |
Lea
Symbols |
| 5
years and up |
Acuity |
Lea
Numbers, HOTV, McClure |
| Contrast |
Lea
Numbers, Pelli Robson |
| Low
Vision |
Acuity |
Cardiff,
SOSH, Feinbloom, Lea Numbers |
| Contrast |
Cardiff |
| Adult |
Acuity |
Snellen,
Sloan, Lea Numbers, HOTV |
| Contrast |
Lea
Numbers, Pelli Robson, Sloan |