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Optical Defocus to Stimulate Eye Elongation in Hyperopia

NCT00950924 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2021-01-12

No results posted yet for this study

Summary

Axial hyperopia results when the length of the eye is too short for the eye to properly focus distance objects on the retina while the focusing system is relaxed. Emmetropization is the process by which the eye actively adjusts various components of the eye to gradually improve the focus of the eye. Emmetropization frequently involves either an increase or a decrease in the growth of the eye, particularly during infancy and childhood. Numerous animal studies suggest that if an animal is exposed to retinal images located behind the retina either centrally or peripherally, the eye will grow in the direction of the focused image. If an abnormally short eye has resulted in hyperopia, exposing such an eye to retinal images partially located behind the retina might encourage axial elongation, thus reducing the hyperopia.

Conditions

  • Hyperopia
  • Refractive Error

Interventions

DEVICE

Simultaneous Vision Bifocal Soft Contact Lenses

Simultaneous Vision Bifocal Soft Contact Lenses will be prescribed such that the distance vision as measured by manifest subjective refraction will be properly corrected by the near vision add power and undercorrected by the distance power.

DEVICE

Single Vision Soft Contact Lenses

Single vision soft contact lenses will be prescribed to properly correct the distance vision as measured by manifest subjective refraction.

Sponsors & Collaborators

  • Aller, Thomas A., OD

    lead OTHER

Principal Investigators

  • Thomas A Aller, O.D. · Unafilliated

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
5 Years
Max Age
12 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2015-01-31
Primary Completion
2021-10-31
Completion
2022-01-01

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00950924 on ClinicalTrials.gov