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. 2014 Feb 21;28(5):567–575. doi: 10.1038/eye.2014.26

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.