Table 3.
Mean±SD | 1 Week | 1 Month | 3 Months | 6 Months | 1 Year | p-Value* | ||
---|---|---|---|---|---|---|---|---|
ETDRS (logMAR) | 60 cm | UCIVA | 0.04±0.09 | 0.03±0.09 | 0.03±0.10 | 0.02±0.10 | 0.01±0.09 | 0.88 |
DCIVA | 0.03±0.07 | 0.02±0.07 | 0.02±0.07 | 0.01±0.20 | 0.00±0.20 | 0.94 | ||
p-Value** | 0.76 | 0.65 | 0.77 | 0.81 | 0.80 | |||
80 cm | UCIVA | 0.05±0.08 | 0.05±0.08 | 0.05±0.09 | 0.04±0.08 | 0.03±0.08 | 0.80 | |
DCIVA | 0.04±0.08 | 0.04±0.08 | 0.04±0.08 | 0.03±0.07 | 0.02±0.08 | 0.86 | ||
p-Value** | 0.44 | 0.52 | 0.66 | 0.64 | 0.64 | |||
Reading speed (wpm) | 40 cm | Uncorrected | 120±41 | 127±34 | 126±33 | 130±33 | 133±30 | 0.64 |
Corrected | 131±51 | 137±41 | 138±41 | 141±39 | 144±37 | 0.80 | ||
p-Value** | 0.35 | 0.31 | 0.21 | 0.25 | 0.21 | |||
60 cm | Uncorrected | 152±39 | 164±40 | 165±43 | 168±44 | 170±42 | 0.45 | |
Corrected | 158±51 | 164±45 | 164±44 | 169±44 | 171±42 | 0.79 | ||
p-Value** | 0.60 | 0.98 | 0.85 | 0.95 | 0.90 | |||
80 cm | Uncorrected | 145±36 | 150±37 | 151±35 | 158±36 | 160±35 | 0.51 | |
Corrected | 157±47 | 159±42 | 163±41 | 168±39 | 171±37 | 0.63 | ||
p-Value** | 0.28 | 0.42 | 0.22 | 0.30 | 0.21 | |||
CSV 1000 (logMAR) | A (3.0) | 1.47±0.18 | 1.52±0.18 | 1.53±0.17 | 1.53±0.15 | 1.54±0.13 | 0.18 | |
B (6.0) | 1.66±0.18 | 1.70±0.17 | 1.72±0.16 | 1.73±0.16 | 1.74±0.15 | 0.09 | ||
C (12.0) | 1.33±0.18 | 1.34±0.22 | 1.38±0.20 | 1.39±0.20 | 1.40±0.20 | 0.27 | ||
D (18.0) | 0.82±0.24 | 0.86±0.23 | 0.91±0.23 | 0.89±0.22 | 0.90±0.21 | 0.17 |
Notes: p-Values: *calculated using ANOVA single-factor test; **calculated using independent t-test.
Abbreviations: UCIVA, uncorrected intermediate visual acuity; DCIVA, distance corrected intermediate visual acuity; wpm, words per minute; CSV, contrast sensitivity (Vector Vision); SD, standard deviation.