The post, telephone, and in person Low Vision Quality of Life questionnaire (LVQOL) implementation groups that were balanced for age, sex, distance visual acuity, contrast sensitivity, and presence of a field defect in the central 20° visual field
| LVQOL implementation method | No of subjects | Median age (years) | M:F ratio | Visual acuity (logMAR) | Contrast sensitivity (dB) | Central field defect (%) |
| Post | 39 | 81 (14) | 1:1.8 | 0.95 (0.51) | 9.3 (4.3) | 51 |
| Telephone | 39 | 79 (18) | 1:1.8 | 0.90 (0.50) | 9.6 (5.6) | 59 |
| In person | 39 | 82 (17) | 1:1.8 | 1.02 (0.47) | 9.7 (4.8) | 59 |
Standard deviation is stated in parentheses for age, visual acuity and contrast sensitivity.