Two-step ablations attempt to correct negative asphericity
on the cornea to improve near vision.
Comparison of six radiographic projections to assess femoral head/neck asphericity
The diameter of this "breathing sphere" solute is a sensitive function of the asphericity
of the excluded volume of the fused sphere solute.
was corrected by applying either the Huynh-Feldt or Greenhouse-Geisser corrections for [epsilon]<0.
Repeated-measures analysis of variance, allowing for multisample asphericity
by applying the Greenhouse-Geisser correction, was used to compare changes in profile of curves for cuff pressure versus time (SYSTAT v 16, SPSS Inc Chicago).
Solution for Best Fitting Spherical Curvature Radius and Asphericity
of Off-Axis Aspherics of Optical Aspheric Surface Component
Optical side effects (haloes/glare) associated with multifocal IOL implantation are reduced in modern, diffractive designs incorporating optical features such as asphericity
and apodization, and multifocal implantation is an increasingly popular choice (9).
Further clinical studies are required to decide whether customising the amount of spherical aberration correction to individual preoperative corneal asphericity
is of clinical benefit in improving contrast and whether improved mesopic contrast comes at the expense of reduced near vision function.
With the addition of asphericity
to the AcrySof([R]) Toric lens, which was already my lens of choice for astigmatic patients, I can now reduce spherical aberration, enhance image quality and improve functional vision for my cataract patients," said Edward Holland, M.
The Company's goal is to achieve custom ablations that optimize the asphericity
and ultimate shape of the eye, so that it is not altered from its preoperative prolate shape thereby inducing certain aberrations that may lead to loss of overall quality of vision," commented Mr.
The human cornea is neither a true spherical, nor a true toric surface, but is a relatively complex aspheric surface with the degree of asphericity
varying in each of the principle meridians.
Differences between groups over time for CBF, HR and MAP were compared using repeated measures analysis of variance with Greenhouse-Geisser correction for multisample asphericity
(SPSS 16 Statistical analysis, SPSS Inc.