Influence of rigid lens decentration and rotation on visual image quality in normal and keratoconic eyes.

ABSTRACT:

Purpose

To investigate whether the movement of a rigid sphero-cylindrical contact lens has a greater impact on the visual image quality in highly aberrated eyes than in normal eyes.

Methods

For 20 normal and 20 keratoconic SyntEyes, a previously determined best sphero-cylindrical rigid lens was permitted to shift by up to ±1 mm from the line of sight and rotate up to ±15°. Each of the 52,111 lens locations sampled was ray-traced to determine the influence on the wavefront aberration. In turn, the logarithm of visual Strehl ratio (log₁₀ [VSX]) was calculated for each aberration structure and was used to estimate the associated changes in logMAR visual acuity. Finally, contour surfaces of two-letter change in visual acuity were plotted in three-dimensional misalignm

SUBMITTER: Rozema JJ 

PROVIDER: S-EPMC9547948 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature