Table 1. Mean and SD for the parameters in each of the three sessions.
| First session | Second session | Third session | ||||
|---|---|---|---|---|---|---|
| Parameters | Mean | SD | Mean | SD | Mean | SD |
| MTF cutoff (cpd) | 46.86 | 7.87 | 46.93 | 7.52 | 47.07 | 7.49 |
| SR | 0.28 | 0.06 | 0.27 | 0.06 | 0.27 | 0.06 |
| OV100% | 1.56 | 0.26 | 1.56 | 0.25 | 1.57 | 0.25 |
| OV20% | 1.69 | 0.37 | 1.68 | 0.36 | 1.69 | 0.35 |
| OV9% | 1.74 | 0.41 | 1.71 | 0.42 | 1.73 | 0.41 |
| OSI | 0.32 | 0.21 | 0.33 | 0.21 | 0.33 | 0.21 |
SD = standard deviation; MTFcutoff = modulation transfer function cutoff frequency; cpd = cycles per degree; SR = strehl ratio in 2 dimensions; OV = OQAS values; OSI = objective scatter index.