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Optom Vis Sci. 2005 Jan;82(1):59-63.

Theoretical calculation of a contact lens thickness designed to correct the eye's monochromatic aberrations.

Author information

1
Departamento de FĂ­sica, Universidade do Minho, Braga, Portugal.

Abstract

PURPOSE:

The aim of this work is the theoretical study of high order aberration compensation in the human eye.

METHODS:

This compensation should be achieved with uneven thickness contact lenses (rigid gas permeable or soft), capable of inducing a localized delay on the aberrated wavefront, so that light beams originated on a point object would reach the retina at a common point, irrespective of their point of passage through the pupil.

RESULTS:

The algorithm for optimal local contact lens thickness determination is explained. For this purpose the aberrated wavefront measured on a patient by the double-pass technique was expressed in terms of Zernike polynomials. The knowledge of the wave aberration as a function of the point of passage through the pupil allows determination of the delay to be introduced in order to produce a wavefront as would result from non-aberrated eye, where all rays would reach the same point on the retina.

CONCLUSIONS:

The explanation of how it would be possible to correct wavefront deviations, by varying an RGP or soft contact lens thickness, was made, and a particular eye exemplify.

PMID:
15630405
[Indexed for MEDLINE]

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