Myopia
Conditions
Interventions
Experimental Group:Multi-ring defocus lenses
Control Group:Ordinary lense
Sponsors
The Zhongshan Ophthalmic Center,Sun Yat-sen University
Eligibility
Sex/Gender
All
Age
8 Years to 13 Years
Inclusion criteria
Inclusion criteria: 1.Age 8-13 years old, male or female; 2.Binocular spherical equivalent -1.00 to -5.00D; 3.Astigmatism <=-1.50D in both eyes; 4.Anisometropia <=1.00D; 5.The best corrected visual acuity of both eyes was not less than 20/20; 6.Strabismus should not exceed 20 degrees; 7.Good cognition and ability to cooperate with the examination; 8.Able to consent and participate in the follow-up study; 9.Signed informed consent.
Exclusion criteria
Exclusion criteria: 1.Limited activity due to a medical illness, drug or emotional state; 2.Patients with organic diseases of eye and other parts; 3.Patients with a history of eye surgery; 4.The use of other drugs that may affect vision (except for cycloplegic agents for examination); 5.Have worn contact lenses within the last month; 6.Those who have used other myopia prevention and control methods in the past year (such as other defocusing lenses, progressive lenses, bifocal lenses, bifocal prisms, orthokeratology lenses, defocusing soft lenses, defocusing RGP, atropine, etc.); 7.Other investigators involved in the past month that may directly or indirectly affect clinical outcomes; 8.Subjects who are unable to communicate or do not follow instructions; 9.Other conditions in which the investigator deems it inappropriate to participate in a clinical trial.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Axial Length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Spherical equivalent; | — |
Countries
China
Contacts
Public ContactJinrong Li
The Zhongshan Ophthalmic Center,Sun Yat-sen University
Outcome results
None listed