Evaluation of Visual Performance With Contact Lenses

University of Houston26 enrolled

Overview

This study will evaluate the influence of contact lens optical design on visual performance using standard and multifocal soft contact lenses (MFCLs).

The study will examine visual acuity with various contact lenses, with and without glare source, in myopes between the ages of 18-39 years old (inclusive) to determine the effect of different multifocal optical designs on visual performance in the post-fit period.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Myopia

Interventions

Single Vision Contact LensDEVICE

Spherical Contact Lens worn on non-dispensing basis

Multifocal Contact Lens 1DEVICE

Multifocal Contact Lens worn on non-dispensing basis

Multifocal Contact Lens 2DEVICE

Multifocal Contact Lens worn on non-dispensing basis

Eligibility

Sex: ALLMin age: 18 YearsMax age: 39 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * 18 to 39 years of age * Best corrected visual acuity of at least 20/30 * Spherical equivalent refractive error in each eye of between -0.75 and -6.00 diopters sphere after vertexing to the corneal plane Exclusion Criteria: * Greater than -1.00 diopter of refractive astigmatism at the corneal plane * Any active anterior segment disease, pathology, or surgery affecting vision, refraction, or the ability to wear a soft contact lens * History of ocular trauma or surgery causing abnormal or distorted vision * Current Rigid Gas Permeable (RGP) contact lens wearers * Unwilling to have eyes photographed or video recorded * Pregnant and/or lactating females, by self-report

Locations (1)

University of Houston

Houston, Texas, United States

Outcomes

Primary Outcomes

Low Contrast Visual Acuity with Glare

Vision with contact lenses measured under low illumination conditions with glare source

Time frame: Through study completion, an average of 3 hours

Secondary Outcomes

Low Contrast Visual Acuity without Glare

Vision with contact lenses measured under low illumination conditions without glare source

Time frame: Through study completion, an average of 3 hours

Data from ClinicalTrials.gov

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