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Corneal deformation characteristics after different refractive cornea surgical procedures

Poster Details

First Author: F.Dillner GERMANY

Co Author(s):    D. Breyer   H. Kaymak   K. Klabe   C. Pohl     

Abstract Details


Refractive surgery at the cornea represents a standard procedure today. We were interested, whether it is possible to describe new parameters by application of a technique, which combines scheimpflug based high speed video recording with non contact applanation. This technique might provide insight into biomechanic parameters of the cornea.


Breyer Kaymak Augenchirurgie, Dusseldorf, Germany


We analyzed videos pre- and postoperatively concerning several corneal refractive surgeries: crosslinking, intracorneal ring segment (ICRS) implantation, presbyobia treatment via raindrop™ implantation and myopia treatment via Relex-Smile. Parameters like pachymetry, deformation amplitude, length of applanation as well as intraocular pressure were analyzed before and after treatment.


Regarding the individual treatments, each surgery has a different impact on the corneal deformationamplitude after treatment. The intraocular pressure showed similar tendencies in each surgery category. Several other parameters showed opposing or same tendencies.


The corneal flexibility is still poorly described in literature. We suggest a few parameters, which could be of future interest: deformation amplitude, applanation length, pachymetry as well as intraocular pressure. The context of these paramters could allow to describe physically a viscoelastic cornea for the first time. Future studies might give further evidence for a context between these parameters.

Financial Disclosure:


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