High Myopia, Myopia
Conditions
Brief summary
The study aimed to collect multi-factor information on school-age children with pre-clinical myopia, and to identify the initial factors and warning signs of myopia.
Detailed description
The incidence of myopia is high in China. At present, the mechanism of myopia is unclear, and the main theories are genetic and environmental aspects. Many factors may affect the occurrence and development of myopia in students, such as ocular biological parameters, peripheral refractive state, differences in binocular vision function, eye habits, and outdoor time. In this study, the multi-factor information on pre-clinical myopia in school-age children was collected to find out the initial factors and warning signals of myopia.
Interventions
BEHAVIORALHome training
Letter Chart Accomodative Rock Training for 2 minutes each time
BEHAVIORALSchool training
Letter Chart Accomodative Rock Training for 2 minutes each time
Sponsors
Tianjin Eye Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
5 Years to 12 Years
Healthy volunteers
No
Inclusion criteria
* All students in grades 1 to 4 * Can cooperate with the examination of students
Exclusion criteria
* Obvious strabismus and amblyopia * Eye diseases that affect vision, such as congenital cataracts, glaucoma, and retinal diseases * History of ocular surgery
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The rate of new-onset myopia | Through study completion, an average of 1 year | The number of new children with myopia was counted |
| The changes of refractive error | Every 6 months, up to 3 years | The changes of refractive error between visit time and baseline which was obtained with a computer refractometer. |
| The changes of axial length | Every 6 months, up to 3 years | The axial length was measured by a biological measuring instrument. |
Countries
China
Outcome results
None listed