Corneal topography is an essential tool to perform the evaluation in refractive surgery preoperatively; it presents the curvature properties of the anterior corneal surface and is used to measure and evaluate its pattern and profile. Therefore, evaluation of the cornea by computerized topography has ...
The cornea forms part of the structural coat of the eye. As well as being tough, it must be transparent and maintain a smooth and stable curvature since it contributes to the major part of the focusing power of the eye. Whilst those properties can be readily appreciated clinically, ...
To determine the statistically normal range of corneal Young's modulus in young healthy eyes in vivo, and to establish if this variation has a clinically significant influence on intraocular pressure (IOP) measurement using applanation tonometry. Central corneal curvature, central corneal thickness (CCT...
The axis number doesn’t tell you how much astigmatism your eyes have — only how irregularly shaped your cornea is. As you may have heard, astigmatism is a refractive error in which the cornea doesn't have the ideal spherical curvature. Instead, the cornea is shaped like an egg. Some ey...
There is no apparent association between age and either apical radius or p-value for the subjects used in this study. The asphericity of the cornea does not show any apparent association with corneal curvature in this group of subjects. 展开 ...
A previous study analyzing the development of visual field (VF) defects in highly myopic eyes showed that an abrupt change in scleral curvature due to posterior staphyloma is the only factor significantly associated with VF defect progression, suggesting that stretching and distortion of the optic ...
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 radius of corneal curvature at the time of maximum ...
CorneaphotokeratoscopyradiusofcurvaturematematicalmodelBoth eyes of 40 normal persons were examined with a photokeratoscope. A method for analyzing the photokeratoscopic data based on the principle of least square fitting is presented. It is demonstrated that the corneal flattening expressed as the ...
The central‐peripheral radius of the normal corneal curvatureCorneaphotokeratoscopyradius of curvaturematematical modelBoth eyes of 40 normal persons were examined with a photokeratoscope. A method for analyzing the photokeratoscopic data based on the principle of least square fitting is presented. ...
CorneaCorneal Topography角膜角膜地形图To map the thickness, elevation (anterior and posterior corneal surface), and axial curvature of the cornea in normal eyes with the Orbscan corneal topography system. 94 eyes of 51 normal subjects were investigated using the Orbscan corneal topography system. The...