Myopia
Conditions
Keywords
Myopia, Myopia control, Progressive myopia, Near vision behavior, Outdoor activity, Environment, Light exposure
Brief summary
Currently, optical and pharmacological interventions have been developed to prevent the progression of childhood myopia. However, no myopia control strategy has been shown to have complete efficacy in controlling myopia progression in children. One possible reason is that risk factors contributing to the development of myopia were not controlled in previous clinical studies including time outdoors and near vision behaviour. This study aims to quantify time spent outdoors and near vision behavior in myopic children and its impact on myopia control efficacy. The outcomes of this study will guide clinicians on risk management and improve responses to existing treatments for progressive myopia.
Interventions
DEVICEVivior
The Vivior is a wearable clip-on sensor that objectively quantifies near viewing distance and duration, and ambient illumination. The Vivior will be attached to the spectacles frame of children undergoing myopia control treatment.
Sponsors
Queensland University of Technology
New England College of Optometry
State University of New York College of Optometry
University of California, Berkeley
The University of New South Wales
Study design
Observational model
CASE_ONLY
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
4 Years to 14 Years
Healthy volunteers
No
Inclusion criteria
1. Aged 6 to below 14 years old 2. Spherical equivalent myopic refractive error greater than -0.50 D 3. Best corrected logMAR visual acuity of 0.1 or better in each eye for 6- to 14-year-old children, and 0.2 logMAR or better than in each eye for 4 and 5-year-old children (adjusted for age-related expectations) 4. Good ocular and general health that would not preclude them from myopia control 5. Competent enough in English to fully understand the participant information and consent form 6. Willing to undergo treatment to slow myopia progression for one year
Exclusion criteria
1. Strabismus at distance or near, or amblyopia 2. Systemic or ocular conditions that may affect contact lens use (e.g. severe allergy) or refractive development (e.g. ptosis) 3. Previous history of ocular surgery, trauma or chronic ocular disease that may affect their vision 4. Ocular or systemic medication use which may interfere or interact with myopia treatment or ocular development 5. Child, parents or guardians not willing to comply with treatment and/or follow-up schedule and planning to migrate or move during the one-year study duration
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Near viewing duration | 12 months | Duration during near tasks |
| Near viewing distance | 12 months | Distance during near tasks |
| Outdoor time | 12 months | Ambient illumination to determine time spent outdoors |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Objective cycloplegic central refraction | 12 months | Change in objective refraction to measure myopia progression |
| Axial length | 12 months | Change in axial length to measure myopia progression |
| Subjective cycloplegic central refraction | 12 months | Change in subjective refraction to measure myopia progression |
Countries
Australia, United States
Contacts
Primary ContactPauline Kang, PhD
Outcome results
None listed