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Biomechanical Properties of the Cornea Measured With the Dynamic Scheimpflug Analyzer in Young Healthy Adults

 Lee, Hun  ;  Kang, David Sung Yong  ;  Ha, Byoung Jin  ;  Choi, Jin Young  ;  Kim, Eung Kweon  ;  Seo, Kyoung Yul  ;  Kim, Ha Yan  ;  Kim, Tae-im 
 Cornea, Vol.36(1) : 53-58, 2017 
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Issue Date
Adult ; Biomechanical Phenomena ; Cornea/anatomy & histology ; Cornea/physiology* ; Cross-Sectional Studies ; Female ; Humans ; Intraocular Pressure/physiology ; Male ; Prospective Studies ; Reference Values ; Regression Analysis ; Tonometry, Ocular/methods* ; Young Adult
corneal biomechanical property ; dynamic Scheimpflug analyzer ; young healthy adults ; normal value database
PURPOSE: To investigate the biomechanical properties of the cornea using the dynamic Scheimpflug analyzer in young healthy adults. METHODS: This prospective cross-sectional population study included 944 eyes of 472 participants aged 20 to 40 years. Participants underwent ophthalmic investigations, including evaluation of biomechanical properties of the cornea using the dynamic Scheimpflug analyzer, manifest refraction, and measurements of keratometric values by autokeratometry, intraocular pressure (IOP) by noncontact tonometer, central corneal thickness (CCT) by ultrasound, and white-to-white distance by Scheimpflug tomography. Statistical analyses included determination of the reference interval with a bootstrapping method, linear quantile mixed-effects model, and Spearman correlation analysis between the corneal biomechanical parameters and other variables (age, manifest refraction spherical equivalent, CCT, IOP, white-to-white, and keratometric values). RESULTS: The 90% CIs of all corneal biomechanical parameters demonstrated that the ranges of the 90% CIs for the reference data were almost identical with and without bootstrapping. Quantile regression to determine the fifth, 50th, and 95th percentiles of each corneal biomechanical parameter supported the findings from the nonparametric method with the 90% CIs. Correlation analysis showed significant correlations between the parameters and variables, but there was a relatively high Spearman correlation coefficient in the case of the correlations with the CCT and IOP. CONCLUSIONS: Using data from a large population of young healthy adults, we developed a database of normal values for multiple corneal biomechanical parameters obtained from the dynamic Scheimpflug analyzer. We conclude that the biomechanical properties of the cornea are influenced by the CCT and IOP.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
Yonsei Authors
김응권(Kim, Eung Kweon) ORCID logo https://orcid.org/0000-0002-1453-8042
김태임(Kim, Tae Im) ORCID logo https://orcid.org/0000-0001-6414-3842
김하얀(Kim, Ha Yan)
서경률(Seo, Kyuong Yul) ORCID logo https://orcid.org/0000-0002-9855-1980
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