Which feature influences on-eye power change of soft toric contact lenses: Design or corneal shape?

ABSTRACT:

Purpose

This study investigates how both the peripheral zone design and corneal shape affect the behaviour of soft contact lenses on-eye.

Methods

In this study, soft contact lenses of varying nominal cylindrical powers and peripheral zone designs-a single-prism gravity-based stabilised lens (G1P), two-prism blink-based stabilised lens (B2P) and four-prism blink-based stabilised lens (B4P)-were generated as finite element models. The on-eye simulation results were analysed to identify the impact of each peripheral zone design (Each with different volume ratios) on the effective power change (EPC) when worn by a subject. Topographies of three eyes of varying average simulated anterior corneal curvature (flat, average & steep) were used in this study.

Results

The volume

SUBMITTER: Doll T 

PROVIDER: S-EPMC7688134 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature