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Table 4 Post-TPRK changes in corneal biomechanical properties (CH and CRF)

From: SmartSurfACE transepithelial photorefractive keratectomy with mitomycin C enhancement after small incision lenticule extraction

Time of follow-up CH
Mean ± SD (range)
CRF
Mean ± SD (range)
Pre-PRK 8.60 ± 1.56 (7.80 to 11.20) 9.20 ± 1.66 (8.30 to 11.50)
1st month post-TPRK 8.49 ± 1.50 (7.36 to 10.84) 9.05 ± 1.80 (7.38 to 10.90)
3rd month post-TPRK 8.48 ± 1.70 (7.36 to 10.84) 9.01 ± 1.40 (7.38 to 10.90)
6th month post-TPRK 8.47 ± 1.60 (7.30 to 10.70) 8.97 ± 1.50 (7.28 to 10.90)
12th month post-TPRK 8.46 ± 1.57 (7.29 to 10.60) 8.96 ± 1.50 (7.29 to 10.87)
P-value 0.972 0.823
  1. TPRK transepithelial photorefractive keratectomy; SD standard deviation; CH corneal hysteresis; CRF corneal resistance factor