Myopia
Conditions
Keywords
Myopia, Outdoor time, Children, Intervention, Prevention
Brief summary
The purpose of this study is to determine whether improved outdoor time has an effect on the onset and progression of myopia in children.
Detailed description
1. To evaluate the effect of increased time outdoors on the incidence of myopia in non-myopic children; 2. To evaluate the effect of increased time outdoors on the progression of myopia in myopic children; 3. To explore if there is dose-response effect of time outdoors on the incidence and progression of myopia.
Interventions
BEHAVIORALOutdoor activity 1
40-minute outdoor activity
BEHAVIORALOutdoor activity 2
Dose 1 plus an additional 40-minute outdoor activities during recesses
Sponsors
Brien Holden Vision
Shanghai Eye Disease Prevention and Treatment Center
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
6 Years to 9 Years
Healthy volunteers
No
Inclusion criteria
1. at baseline be enrolled in grade 1 and 2 of primary schools; 2. have a parent or guardian who is able to read and comprehend Mandarin and give informed consent as demonstrated by signing a record of informed consent; 3. Children verbally consent when registration for examination
Exclusion criteria
1. Any systemic or ocular pathology that may affect the refractive error status of the eye; 2. Strabismus and amblyopia; 3. Intellectual disability; 4. Using any anti-myopia treatments (orthokeratology, atropine, accommodation function training, acupuncture, auricular point sticking, progressive addition spectacle lenses or other anti-myopia contact lenses). 5. Not suitable for inclusion in the study as deemed by the investigator.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Cycloplegic refractive power（auto-refractor instrument） | 1 year | The Cycloplegic refraction of all children are measured by auto-refractor(KR-8900, Topcon) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Axial length(IOL Master instrument) | 6 months | The axial length of the eyeball are measured by IOL Master(version 5.02, Carl Zeiss). |
Outcome results
None listed