Group | TTO utility | SG utility | p Value |
NLP | 0.26 | 0.32 | 0.13 |
LP-CF | 0.47 | 0.60 | 0.57 |
20/200–20/400 | 0.65 | 0.80 | 0.03 |
TTO = time trade-off method; SG = standard gamble method; NLP = no light perception; LP = light perception; CF = counting fingers; p value comparing the TTO and SG methods within each visual group using the paired, two tailed Student's t test.