Medians and ranges of distance visual acuity (logMAR) in the better eye, and percentage correct FFR and FED discrimination with the optimal refractive correction and with the telescopic low vision device. Median gains for FFR and FED are 48% and 50% respectively
| Median | Range | |||
|---|---|---|---|---|
| Variable | Optimal | Ocutech VES | Optimal | Ocutech VES |
| VA (n = 30) logMAR | 0.82 | 0.42 | 0.40 to 1.38 | −0.06 to 0.80 |
| FFR (n = 21) percentage correct recognition | 26% | 68% | 0 to 80% | 20 to 100% |
| FED (n = 28) percentage correct recognition | 46% | 69% | 0 to 73% | 30 to 100% |