Myopia
Conditions
Interventions
Experimental group:Wear a peripheral defocusing lens
Control group:Wear a regular single focus lens
Sponsors
Xiamen University Xiamen Eye Center
Eligibility
Sex/Gender
All
Age
6 Years to 13 Years
Inclusion criteria
Inclusion criteria: Patients must meet the following selection criteria during screening and visits: 1. 6 <= Age<13 years old, gender not limited 2. The refractive status meets the following conditions: 1) After ciliary muscle paralysis, the computer optometry test showed that the equivalent spherical photometry of both eyes was between -0.5D and -4.0D (including -0.50D and -4.0D), 2) Computer optometry detection of astigmatism in both eyes after ciliary muscle paralysis <= 1.50D 3) Computer optometry detection of anisometropia <= 1.5D in both eyes after ciliary muscle paralysis 3. Parents/guardians understand the case and are willing to accept random grouping
Exclusion criteria
Exclusion criteria: Patients who meet any of the following criteria during screening and random visits are not eligible to participate in this study 1. Either eye has refractive system abnormalities such as macula/opacities, cone-shaped opacities, lens opacities, uveitis, macula abnormalities, retinal lesions, etc 2. Either eye has a history of glaucoma 3. Obvious strabismus, amblyopia, or previous refractive surgery 4. Previous or current use of atropine, OK lens, defocusing lens, hard film contact lens 5. Previous systemic diseases: immune system diseases, central nervous system diseases, asthma, diabetes, lung dysfunction, liver and kidney dysfunction 6. Take belladonna, morphine, sleeping pills, etc 7. Have a clear family history of high myopia 8. Researchers believe that there are any other circumstances that are not suitable for participating in the experiment
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Equivalent spherical photometry; | — |
Secondary
| Measure | Time frame |
|---|---|
| Optic axis;Percentage of equivalent spherical photometry progress<-0.50D;Percentage of equivalent spherical photometry progress<-0.75D;Percentage of equivalent spherical photometry progress<-1.00D; | — |
Countries
China
Contacts
Public ContactXiaoxin Li
Xiamen University Xiamen Eye Center
Outcome results
None listed