myopia
Conditions
Interventions
Group1:defocus lenses
Group2:defocus lenses
Group3:single vision lenses
Group4:single vision lenses
Sponsors
Eye Hospital of Wenzhou Medical University
Eligibility
Sex/Gender
All
Age
8 Years to 15 Years
Inclusion criteria
Inclusion criteria: 1. Aged 8 to 15 years; 2. Spherical refractive error of -0.75 to -6.50 D in each eye, as measured by cycloplegic autorefraction; 3. Astigmatism of not more than 1.50 D; 4. Anisometropia of not more than 1.00 D; 5. Best-corrected visual acuity of equal or better than 0.05 LogMAR (>= 0.9 as Snellen).
Exclusion criteria
Exclusion criteria: 1. History of PALs or bifocal use and no prior use of contact lenses; 2. Strabismus by cover test at near and distance; 3. Ocular disease with full ophthalmic examination, such as retinal disease, cataract and ptosis.; 4. Systemic or neurodevelopmental conditions; 5. Ocular or systemic medicine, which might affect myopia progression or visual acuity through known effects on retina, accommodation or significant elevation of intraocular pressure.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| refractive power;Axial Length;contrast visual acuity; | — |
Secondary
| Measure | Time frame |
|---|---|
| peripheral refraction;peripheral axial;choroidal thickness;vessel density of reinal layers;choroidal vessel density;retinal thickness; | — |
Countries
China
Contacts
Public ContactJinhua Bao
Eye Hospital of Wenzhou Medical University
Outcome results
None listed