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Table 4 Correlations between biomechanical parameters and corneal sublayer thickness in the suspected KC (SKC) group

From: Relationship between corneal biomechanical parameters and corneal sublayer thickness measured by Corvis ST and UHR-OCT in keratoconus and normal eyes

  

EPT

BLT

STT

SP-A1a

r

0.223

0.186

0.721

P

0.185

0.270

0.000d

SP-A1c

r

0.049

−0.015

0.686

P

0.780

0.931

0.000d

A1Va

r

−0.057

−0.141

−0.421

P

0.691

0.320

0.002d

A2Va

r

−0.059

0.214

0.353

P

0.677

0.128

0.010d

PDa

r

−0.159

−0.338

−0.413

P

0.260

0.014d

0.002d

HCRa

r

−0.020

0.224

0.386

P

0.887

0.111

0.005d

HCDfAa

r

−0.007

−0.301

−0.365

P

0.963

0.030d

0.008d

IRa

r

−0.054

0.258

−0.654

P

0.702

0.064

0.000d

ARTha

r

0.162

0.095

0.242

P

0.252

0.502

0.084

DA ratioa

r

−0.035

−0.373

−0.815

P

0.803

0.006d

0.000d

CBIb

r

−0.175

−0.268

−0.644

P

0.214

0.055

0.000d

TBIb

r

0.143

−0.227

−0.116

P

0.313

0.106

0.414

  1. EPT = epithelial thickness; BLT = Bowman’s layer thickness; STT = stromal thickness; SP-A1 = stiffness parameter at first applanation; A1V = corneal apex velocity at first applanation; A2V = corneal apex velocity at second applanation; PD = peak distance; HCR = highest concavity radius of curvature; HCDfA = deflection amplitude at highest concavity; IR = integrated radius; ARTh = Ambrosio relational thickness to the horizontal profile; DA = deformation amplitude; CBI = Corvis biomechanical index; TBI = tomographic and biomechanical index; aPearson correlation test; bSpearman correlation test; cPartial correlation analysis controlling for the thickness of the other two layers; dP < 0.05
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Eye and Vision

ISSN: 2326-0254