Journal article

Variability of Corneal Deformation Response in Normal and Keratoconic Eyes

Cong Ye, Marco Yu, Gilda Lai, Vishal Jhanji

OPTOMETRY AND VISION SCIENCE | LIPPINCOTT WILLIAMS & WILKINS | Published : 2015

Abstract

PURPOSE: To compare the corneal deformation response, central corneal thickness (CCT), and intraocular pressure (IOP) measurements and their test-retest variability obtained with an ultrahigh-speed Scheimpflug camera between normal and keratoconus eyes. METHODS: Three consecutive measurements were obtained using Corvis ST. The following parameters were analyzed: A1 and A2 length (length of flattened cornea at first and second applanation), A1 and A2 velocity (deformation velocity until first and second applanation), corneal deformation amplitude (deformation amplitude of cornea at the highest concavity), peak distance (distance of two apices of cornea at time of highest concavity), and radiu..

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