Method of measuring visual acuity and contrast sensitivity
| Number of studies reporting | Distance (n=20) | Intermediate (n=4) | Near (n=20) | Contrast sensitivity (n=14) |
| Snellen | 9 | 2 | ||
| LogMAR | 7 | 2 | 4 | |
| Regan 96% contrast chart | 2 | 2 | ||
| Jaeger reading chart | 6 | |||
| Rosenbaum near acuity card | 3 | |||
| Sloan letters near acuity chart | 2 | |||
| Pelli-Robson contrast sensitivity chart | 6 | |||
| Vision Contrast Test System | 4 | |||
| Other | De Nederlanders (1 study) Salzburg reading desk (1 study) | CGT-1000 contrast sensitivity instrument (1 study) FACT chart/OPTEC 6500 (1 study) | ||
| Chart not specified or unclearly specified | 2 | 3 |
FACT, Functional Acuity Contrast Test.