Table 2. Visual acuity outcome in operated eye.
| 
Day 1 | 
6 Weeks | 
1 Year | 
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
Foldable lens, n=589 | 
Rigid lens, n=611 | 
Foldable lens, n=472 | 
Rigid lens, n=505 | 
Foldable lens, n=481 | 
Rigid lens, n=515 | 
|||||||
| n | % | n | % | n | % | n | % | n | % | n | % | |
| Uncorrected visual acuity | ||||||||||||
| ≥6/9 | 160 | 27.2 | 214 | 35.0 | 142 | 30.2 | 190 | 37.7 | 221 | 46.0 | 253 | 49.1 | 
| <6/9–6/18 | 387 | 65.7 | 379 | 62.0 | 284 | 60.3 | 282 | 56.0 | 213 | 44.3 | 233 | 45.2 | 
| <6/18–6/60 | 37 | 6.3 | 18 | 3.0 | 40 | 8.5 | 30 | 6.0 | 42 | 8.7 | 27 | 5.2 | 
| <6/60 | 5 | 0.9 | 0 | 0 | 5 | 1.1 | 2 | 0.4 | 5 | 1.0 | 2 | 0.4 | 
| χ2 P-value | <0.0001 | 0.036 | 0.092 | |||||||||
| Best-corrected visual acuity | ||||||||||||
| ≥6/9 | Data not collected | 430 | 91.3 | 467 | 92.8 | 448 | 93.1 | 481 | 93.4 | |||
| <6/9–6/18 | 28 | 5.9 | 32 | 6.4 | 19 | 4.0 | 28 | 5.4 | ||||
| <6/18–6/60 | 10 | 2.1 | 3 | 0.6 | 10 | 2.1 | 5 | 1.0 | ||||
| <6/60 | 3 | 0.6 | 1 | 0.2 | 4 | 0.8 | 1 | 0.2 | ||||
| χ2 P-value | 0.138 | 0.157 | ||||||||||
|   | 
  | 
  | 
  | 
  | 
n=470 | 
n=503 | 
n=473 | 
n=502 | 
||||
| Mean cylinder (SD) | Data not collected | 1.05 (0.74) | 1.01 (0.73) | 0.85 (0.68) | 0.92 (0.66) | |||||||
| Range | 0–4.5 | 0–4.5 | 0–3 | 0–4 | ||||||||
| t-test P-value | 0.318 | 0.114 | ||||||||||
Data were missing on uncorrected and best-corrected visual acuity for two people at 6 weeks because data collection forms were incomplete: one in foldable lens group and one in rigid lens group.
Data were missing for best-corrected visual acuity for one additional person at 6 weeks in rigid lens group because keratometry could not be done due to corneal ulcer.