Efficacy of Repeated Low-Level Red-Light Therapy in Myopia Control

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

264 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-07-23

Study Completion Date

2022-12-31

Brief Summary

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The purpose of this study is to determine if repeated low-level red-light therapy can slow myopia progression in Chinese schoolchildren.

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Detailed Description

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Low level light therapy (LLLT) is an innovative and non-invasive therapeutic treatment for a variety of eye diseases. Its potential mechanisms of improving choroidal metabolic rate and circulation may improve scleral hypoxia, thus slowing down the progression of myopia. The investigator's preliminary case-series study suggested that repeated low-level red-light therapy was effective in slowing myopia progression without any clinically observable side effects. Using a randomized clinical trial design, the purpose of this study is to determine if repeated low-level red-light therapy can slow myopia progression in Chinese schoolchildren. Study subjects will be randomly assigned to either the treatment group (receive repeated low-level red-light therapy) or the control group (wearing ordinary single vision lenses). Axial length and cycloplegic refraction will be monitored over one year (1st month, 3rd month, 6th month and 12th month), after which changes in axial length and refractive errors in the two groups will be compared. An interim analysis will be performed at the 3rd month, at which the data will be reported and presented. Appropriate adjustment of the p-value and decision on the continuation of the study will be made.

Conditions

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Myopia Refractive Errors Eye Diseases

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Single vision spectacle lens

Single vision lens with power for correcting distance refraction.

Group Type NO_INTERVENTION

No interventions assigned to this group

Repeated low-level red-light therapy

Single vision lens \& repeated low-level red-light therapy

Group Type EXPERIMENTAL

Low-level Red-light Therapy

Intervention Type DEVICE

In addition to wearing single vision spectacle lens with power for correcting distance refraction, low-level red-light therapy is performed twice per school day at home with an interval of at least 4 hours, each treatment lasting 3 minutes.

Interventions

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Low-level Red-light Therapy

In addition to wearing single vision spectacle lens with power for correcting distance refraction, low-level red-light therapy is performed twice per school day at home with an interval of at least 4 hours, each treatment lasting 3 minutes.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

1. Age at enrolment: 8-13 years
2. Spherical equivalent refractions (SERs): -1.00 to -5.00 diopters (D)
3. Astigmatism of 2.50 D or less
4. Anisometropia of 1.5 D or less
5. Spectacle corrected monocular logMAR visual acuity (VA): 0 or better
6. Parents' understanding and acceptance of random allocation of grouping

Exclusion Criteria

1. Strabismus and binocular vision abnormalities in either eye
2. Ocular abnormalities in either eye or other systemic abnormalities
3. Prior treatment of myopia control, e.g. drugs, orthokeratology, progressive addition lenses, bifocal lenses, etc in either eye
4. Other contraindications in either eye

Minimum Eligible Age

8 Years

Maximum Eligible Age

13 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No