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Table 7 Correlation of eye rubbing frequency and ocular allergic sign scores with corneal tomographic, biomechanical and epithelial thickness parameters in the allergic conjunctivitis (AC) group

From: Corneal biomechanical changes in allergic conjunctivitis

   Corneal tomography TBI Epithelial thickness
ISV IVA KI IHD BAD-D 2–5 mm 5–7 mm min SD
Eye rubbing r 0.348 0.362 0.228 0.276 0.424 0.341 −0.648 −0.553 −0.443 0.122
pa 0.059 0.049* 0.225 0.140 0.020* 0.065 < 0.001* 0.002* 0.014* 0.522
Hyperemia r 0.293 0.034 −0.103 0.066 0.084 0.143 0.075 −0.147 −0.337 0.391
pa 0.115 0.857 0.590 0.729 0.658 0.451 0.695 0.439 0.068 0.033*
Swelling r 0.638 0.295 0.179 0.292 0.291 0.315 −0.122 −0.366 −0.560 0.641
pa < 0.001* 0.113 0.345 0.118 0.119 0.090 0.521 0.047* 0.001* < 0.001*
Papillae r 0.520 0.313 0.330 0.295 0.066 0.105 0.043 −0.189 −0.401 0.467
pa 0.003* 0.092 0.075 0.113 0.729 0.580 0.821 0.317 0.028* 0.009*
Epithelial disorder r 0.584 0.340 0.308 0.314 0.401 0.370 −0.318 −0.497 −0.608 0.471
pa 0.001* 0.066 0.098 0.091 0.028* 0.044* 0.087 0.005* < 0.001* 0.009*
  1. AC = allergic conjunctivitis; ISV = index of surface variance; IVA = index of vertical asymmetry; KI = keratoconus index; IHD = index of height decentration; BAD-D = Belin/Ambrosio enhanced ectasia total deviation index; TBI = tomography and biomechanical index; min = minimum; SD = standard deviation
  2. a Statistically significant findings (P < 0.05) are indicated by an asterisk