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Table 1 Descriptive statistics of variables in the evaluations before and 3 and 12 months after surgery

From: Intraocular pressure after myopic laser refractive surgery measured with a new Goldmann convex prism: correlations with GAT and ORA

  PRE-SURGERY
MD ± SD
POST 3 M
MD ± SD
POST 12 M
MD ± SD
GAT (mmHg)a
• ALL 15.80 ± 2.72 12.00 ± 2.32 13.04 ± 2.55
• LASIK 15.60 ± 3.27 11.01 ± 2.31 12.90 ± 2.64
• PRK 16.01 ± 1.45 13.05 ± 1.13 14.20 ± 2.27
CT (mmHg)a
• ALL 21.07 ± 4.35 15.80 ± 3.07 16.30 ± 3.34
• LASIK 21.05 ± 4.59 14.05 ± 2.67 15.80 ± 3.22
• PRK 22.00 ± 4.01 17.09 ± 2.55 17.30 ± 3.47
IOPcc (mmHg)a
• ALL 15.89 ± 3.07 13.07 ± 2.52 13.06 ± 2.40
• LASIK 16.40 ± 2.93 12.48 ± 2.20 12.87 ± 2.77
• PRK 15.02 ± 3.26 14.08 ± 2.83 13.38 ± 1.65
IOPg (mmHg)a
• ALL 15.49 ± 2.98 8.95 ± 2.79 9.62 ± 2.73
• LASIK 15.81 ± 2.77 8.24 ± 2.57 9.62 ± 3.00
• PRK 14.93 ± 3.37 10.17 ± 2.87 9.61 ± 2.32
SER (dpts)
• ALL − 4.98 ± 2.28 0.00 ± 0.30 0.02 ± 0.22
• LASIK −5.83 ± 2.21 0.05 ± 0.33 0.03 ± 0.25
• PRK −3.52 ± 1.33 0.05 ± 0.23 0.03 ± 0.15
simK
• ALL 43.70 ± 1.13 39.80 ± 1.96 39.90 ± 2.00
• LASIK 43.70 ± 1.16 39.30 ± 2.06 39.40 ± 2.04
• PRK 43.60 ± 1.11 40.60 ± 1.53 40.08 ± 1.62
CCT (μ)
• ALL 543 ± 27.08 457 ± 35.90 469 ± 41.30
• LASIK 554 ± 22.30 460 ± 40.70 466 ± 42.40
• PRK 524 ± 26.40 452 ± 26.60 473 ± 41.10
CH
• ALL 10.53 ± 1.28 7.88 ± 1.16 8.07 ± 1.03
• LASIK 10.44 ± 1.12 7.85 ± 1.10 8.04 ± 1.05
• PRK 10.67 ± 1.56 7.92 ± 1.32 8.11 ± 1.05
CRF
• ALL 9.88 ± 1.12 6.29 ± 1.40 6.59 ± 1.25
• LASIK 9.97 ± 1.09 6.05 ± 1.37 6.54 ± 1.20
• PRK 9.72 ± 1.21 6.70 ± 1.43 6.68 ± 1.39
PTA
• ALL   12.90 ± 4.73  
• LASIK   14.40 ± 4.94  
• PRK   10.30 ± 2.99  
Max.Abl    
• ALL   70.50 ± 26.80  
• LASIK   79.90 ± 27.50  
• PRK   54.10 ± 16.40  
  1. Significant differences between LASIK and PRK IOPm are marked in bold
  2. Comparisons between pre- and post-surgery: a, Wilcoxon test, p < 0.001. All values are in mean ± standard deviation (MD ± SD). GAT Goldmann applanation tonometer, CT Convex tonometer, IOPcc Corneal-compensated IOP, IOPg Goldmann-correlated IOP, SER Spherical equivalent refraction, simK simulated keratometry, CCT Central corneal thickness, PTA Percent tissue altered, Max.Abl Maximum corneal ablation, CH Corneal hysteresis, CRF Corneal resistance factor, M Months