A Frequency Domain Analysis of Corneal Deformation by Air Puff
نویسندگان
چکیده
منابع مشابه
Contributing factors to corneal deformation in air puff measurements.
PURPOSE Air puff systems have been presented recently to measure corneal biomechanical properties in vivo. In our study we tested the influence of several factors on corneal deformation to an air puff: IOP, corneal rigidity, dehydration, presence of sclera, and in vivo versus in vitro conditions. METHODS We used 14 freshly enucleated porcine eyes and five human donor eyes for in vitro experim...
متن کاملCorneal Viscoelastic Properties from Finite-Element Analysis of In Vivo Air-Puff Deformation
Biomechanical properties are an excellent health marker of biological tissues, however they are challenging to be measured in-vivo. Non-invasive approaches to assess tissue biomechanics have been suggested, but there is a clear need for more accurate techniques for diagnosis, surgical guidance and treatment evaluation. Recently air-puff systems have been developed to study the dynamic tissue re...
متن کاملDynamic OCT measurement of corneal deformation by an air puff in normal and cross-linked corneas
A new technique is presented for the non-invasive imaging of the dynamic response of the cornea to an air puff inducing a deformation. A spectral OCT instrument combined with an air tonometer in a non-collinear configuration was used to image the corneal deformation over full corneal cross-sections, as well as to obtain high speed measurements of the temporal evolution of the corneal apex. The ...
متن کاملMaterial Properties from Air Puff Corneal Deformation by Numerical Simulations on Model Corneas
OBJECTIVE To validate a new method for reconstructing corneal biomechanical properties from air puff corneal deformation images using hydrogel polymer model corneas and porcine corneas. METHODS Air puff deformation imaging was performed on model eyes with artificial corneas made out of three different hydrogel materials with three different thicknesses and on porcine eyes, at constant intraoc...
متن کاملAir puff induced corneal vibrations: theoretical simulations and clinical observations.
PURPOSE To investigate air puff induced corneal vibrations and their relationship to the intraocular pressure (IOP), viscoelasticity, mass, and elasticity of the cornea based on theoretical simulations and preliminary clinical observations. METHODS To simulate the corneal movement during air puff deformation, a kinematic viscoelastic corneal model was developed involving the factors of cornea...
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ژورنال
عنوان ژورنال: Journal of IKEEE
سال: 2014
ISSN: 1226-7244
DOI: 10.7471/ikeee.2014.18.2.240