Dilated Versus Non-Dilated Wavefront Corrections for Patients With Down Syndrome

Summary

Individuals with Down syndrome (DS) live with visual deficits due, in part, to elevated levels of higher-order optical aberrations (HOA). HOAs are distortions/abnormalities in the structure of the refractive components of the eye (i.e. the cornea and the lens) that, if present, can result in poor quality focus on the retina, thus negatively impacting vision. HOAs in the general population are overall low, and thus not ordinarily considered during the eye examination and determination of refractive correction. However, for some populations, such as individuals with DS, HOAs are elevated, and thus the commonly used clinical techniques to determine refractive corrections may fall short. The most common clinical technique for refractive correction determination is subjective refraction whereby a clinician asks the patient to compare different lens options and select the lens that provides the best visual outcome. Given the cognitive demands of the standard subjective refraction technique, clinicians rely on objective clinical techniques to prescribe optical corrections for individuals with DS. This is problematic, because it may result in errors for eyes with elevated HOA given that these techniques do not include measurement of the HOAs. The proposed research evaluates the use of objective wavefront measurements that quantify the HOAs of the eye as a basis for refractive correction determination for patients with DS. The specific aim is to determine whether dilation of the eyes is needed prior to objective wavefront measurements. Dilation of the eyes increases the ability to measure the optical quality of the eye and paralyzes accommodation (the natural focusing mechanism of the eye), which could be beneficial in determining refractions. However, the use of dilation lengthens the process for determining prescriptions and may be less desirable for patients.

Conditions

• Down Syndrome
• Refractive Errors

Interventions

DEVICE

Dilated Refraction

The dilated refraction will be a trial spectacle frame composed of lenses based upon a spectacle prescription determined from dilated measures of the eye using a wavefront aberrometer.

DEVICE

Non-Dilated Refraction

The non-dilated refraction will be a trial spectacle frame composed of lenses based upon a spectacle prescription determined from non-dilated measures of the eye using a wavefront aberrometer.

Sponsors & Collaborators

• University of Houston

  collaborator OTHER

• Ohio State University

  lead OTHER

Principal Investigators

• Heather Anderson, OD, PhD · Ohio State University

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

CROSSOVER

Eligibility

Min Age

5 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2022-05-06

Primary Completion

2025-01-24

Completion

2025-01-24

Countries

• United States

Study Locations