A Randomized Trial to Evaluate the Effect of Toric Versus Spherical Contact Lenses on Vision and Eyestrain.

ABSTRACT:

Objectives

To compare the effect of toric versus spherical soft contact lenses on objective measures of visual performance using visual acuity and electromyography of the orbicularis oculi muscle.

Methods

Current soft contact lens wearers with -0.75 to -1.75 D astigmatism in each eye were binocularly fitted with toric (1-Day ACUVUE MOIST for astigmatism) and spherical (1-Day ACUVUE MOIST) contact lenses in random order. After each fitting and at 1-week follow-up, high- and low-contrast visual acuities were measured. Electromyography was used to objectively evaluate eyestrain. Linear mixed models were used to assess differences between toric and spherical contact lenses.

Results

The mean age (±SD) of the 60 participants was 27.5±5.0 years, spherical refractive error wa

SUBMITTER: Berntsen DA 

PROVIDER: S-EPMC6319569 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature