Corneal visualization Scheimpflug technology evaluates corneal biomechanical properties in children with different refractive states

Abstract

Objective To evaluate the corneal biomechanical parameters in myopic, hypermetropic and emmetropic eyes using corneal visualization Scheimpflug technology (CorVis ST). Methods A total of 123 children having 191 myopic, hypermetropic and emmetropic eyes admitted to our hospital from August 2019 to January 2020 were enrolled in this study. Corneal biomechanical parameters, axial length (AL) and corneal curvature were measured using CorVis ST and Lenstar 900 respectively. Univariate linear correlation analysis and multivariate linear regression analysis were used to assess the impacts of age, spherical equivalent (SE), AL, central corneal thickness (CCT) and mean corneal curvature on corneal biomechanical parameters. Results Multivariate linear regression analysis indicated that SE was positively correlated with time at first applanation (A1T, P=0.004); AL was positively correlated with A1T (P=0.017) and radius of reverse curvature at the time of highest concavity (HCR, P=0.02), but negatively with deformation amplitude at second applanation (A2DA, P < 0.001); CCT was positively correlated with length at first applanation (A1L, P < 0.001), A1DA (P=0.005), time of highest concavity (P=0.004), but negatively with A1T (P=0.041). Conclusion The biomechanical parameters of children may be related with their refractive states. Higher myopic eyes tend to have lower corneal elasticity.

Keywords

• corneal visualization scheimpflug technology
• corneal biomechanical parameters
• myopia
• hyperopia