Skip to main content

Table 1 Baseline and 3-month postoperative parameters in arm A (n = 39 bilateral cases) and arm B (n = 33 bilateral cases)

From: Comparison of transepithelial and conventional photorefractive keratectomy in myopic and myopic astigmatism patients: a randomized contralateral trial

   Arm A Arm B
tPRK mPRK P-value* tPRK aaPRK P-value*
UDVA (logMAR) Baseline 1.37 ± 0.35 1.33 ± 0.36 0.03 1.46 ± 0.31 1.39 ± 0.33 0.008
Postoperative 0.02 ± 0.04 0.02 ± 0.04 0.71 0.02 ± 0.04 0.01 ± 0.02 0.72
BCVA (logMAR) Baseline 0.001 ± 0.001 0.003 ± 0.016 0.31 0.00 ± 0.01 0.00 ± 0.00 0.33
Postoperative 0.01 ± 0.04 0.02 ± 0.03 0.17 0.01 ± 0.02 0.00 ± 0.00 0.80
SE (D) Baseline −4.52 ± 1.26 −4.36 ± 1.31 0.08 −4.55 ± 1.14 −4.33 ± 1.16 0.14
Postoperative 0.27 ± 0.42 0.29 ± 0.37 0.67 0.33 ± 0.47 0.26 ± 0.36 0.27
Sphere (D) Baseline −4.02 ± 1.16 −3.78 ± 1.24 0.01 −4.03 ± 1.17 −3.76 ± 1.10 0.06
Postoperative 0.47 ± 0.39 0.47 ± 0.38 0.92 0.52 ± 0.48 0.49 ± 0.34 0.91
Cylinder (D) Baseline −1.01 ± 0.77 −1.15 ± 0.77 0.05 −1.03 ± 0.82 −1.14 ± 0.74 0.30
Postoperative −0.41 ± 0.30 −0.33 ± 0.20 0.13 −0.36 ± 0.29 −0.48 ± 0.32 0.07
  1. tPRK Transepithelial photorefractive keratectomy, mPRK Mechanical PRK, aaPRK Alcohol-assisted PRK, UDVA Uncorrected distance visual acuity, CDVA Corrected distance visual acuity, SE Spherical equivalent, D Diopter
  2. *Paired t test
  3. Data are presented as Mean ± SD