myopia
Conditions
Interventions
Experimental group:Refractive correction is performed using asymmetrical peripheral defocus lenses
Control group:Refractive correction is performed with single vision lenses
Sponsors
Zhongshan Ophthalmic Center, Sun Yat-sen University
Eligibility
Sex/Gender
All
Age
8 Years to 13 Years
Inclusion criteria
Inclusion criteria: 1. Ages 8-13 years, male or female; 2. Myopia equivalent spherical power -1.00~-5.00D; 3. Astigmatism<=-1.50D; 4. Ansometropia<=1.00D; 5. Best corrected visual acuity not less than 20/20; 6. Strabismus does not exceed 20? 7. Good cognition and ability to cooperate with the examination; 8. Able to consent and participate in follow-up studies; 9. Sign the informed consent form.
Exclusion criteria
Exclusion criteria: 1. Restricted activity due to medical illness, medication, or emotional state; 2. Patients with organic diseases of the eyes and other parts; 3. Those with a history of previous eye surgery; 4. Those who are concomitant with other drugs that may affect vision; 5. Those who have worn contact lenses in the past month; 6. Those who have used other myopia prevention and control methods in the past year (such as other defocal lenses, gradual Lenses, bifocals, bifocal prisms, orthokeratology lenses, defocus soft lenses, defocus RGP, atropine, etc.); 7. Participation in other studies that may directly or indirectly affect clinical outcomes within the past month He who; 8. Subjects who are unable to communicate or do not follow instructions; 9. Other conditions that the investigator considers inappropriate to participate in clinical trials.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Equivalent spherical power;Axial length; | — |
Countries
China
Contacts
Public ContactLi Jinrong
Zhongshan Ophthalmic Center, Sun Yat-sen University
Outcome results
None listed