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Table 1 Parameters pre vs. post rubbing in case and control eyes

From: A randomized, fellow eye, comparison of keratometry, aberrometry, tear film, axial length and the anterior chamber depth after eye rubbing in non-keratoconic eyes

  Cases p-value* Controls p-value*
Pre-rubbing Post-rubbing   Pre-rubbing Post-rubbing  
Anterior Keratometry (D)
(Mean ± SD)
Mean K1 42.51 ± 1.52
(38.80; 46.30)
42.36 ± 1.53
(38.50; 45.40)
0.003 42.51 ± 1.49
(39.00; 45.70)
42.60 ± 1.48
(38.90; 45.80)
0.087
Mean K2 43.36 ± 1.73
(39.70; 47.80)
43.40 ± 1.61
(39.70; 46.80)
0.558 43.42 ± 1.64
(39.60; 46.80)
43.47 ± 1.54
(39.80; 46.00)
0.459
Mean Kmax 44.19 ± 1.75
(40.30; 47.70)
43.46 ± 1.92
(40.40; 50.90)
0.223 44.18 ± 1.61
(40.00; 47.40))
44.36 ± 1.68
(40.70; 49.40)
0.116
Posterior Keratometry (D) (Mean ± SD) Mean K1 −6.07 ± 0.24
(−6.70; −5.60)
−6.07 ± 0.25
(−6.70; −5.60)
0.799 −6.09 ± 0.25
(−6.80; −5.60)
−6.08 ± 0.24
(−6.80; −5.50)
0.699
Mean K2 −6.24 ± 0.90
(−7.10; −0.40)
−6.36 ± 0.28
(−7.00; −0.40)
0.324 −6.38 ± 0.29
(−7.20; −5.70)
−6.11 ± 1.82
(−7.20; 6.20)
0.281
Mean Kmax 44.19 ± 1.75
(40.40; 47.70)
44.36 ± 1.92
(40.40; 50.90)
0.223 44.18 ± 1.61
(40.00; 47.40)
44.36 ± 1.68
(40.70; 49.40)
0.116
Overall anterior corneal power vectors (D) J0 −0.33 ± 0.32 −0.43 ± 0.36 0.004 −0.38 ± 0.29 −0.37 ± 0.28 0.477
J45 −0.02 ± 0.19 −0.03 ± 0.23 0.334 0.02 ± 0.20 0.01 ± 0.19 0.374
Overall posterior corneal power vectors (D) J0 −0.13 ± 0.06 −0.14 ± 0.06 0.333 −0.14 ± 0.06 −0.13 ± 0.07 0.521
J45 −0.00 ± 0.05 −0.00 ± 0.05 0.654 0.01 ± 0.06 0.01 ± 0.06 0.939
 ACD (mm) (Mean ± SD) 2.85 ± 0.39
(2.12; 3.77)
2.85 ± 0.39
(2.07; 3.74)
0.057 2.85 ± 0.39
(2.10; 3.83)
2.85 ± 0.39
(3.84; 2.10)
0.601
 AL (mm) (Mean ± SD) 23.71 ± 1.05 (21.26; 26.42) 23.73 ± 1.11 (21.54; 27.30) 0.124 23.71 ± 1.06 (21.26; 26.42) 23.78 ± 1.09 (21.54; 27.30) 0.133
 TBUT (sec) (Mean ± SD) 5.31 ± 2.58 (2.00; 10.00) 3.92 ± 2.32 (1.00; 10.00) <0.001 5.31 ± 2.66 (2.00; 10.00) 4.86 ± 2.49 (1.00; 10.00) 0.096
  1. Abbreviations: D = Diopters; ACD = Anterior chamber depth; AL = Axial Length; mm = millimetres; SD = standard deviation * paired t test