myopia
Conditions
Interventions
Group 1:Concentric defocus soft contact lens
Group 2:Single vision glasses (spectacles)
Sponsors
West China hospital, Sichuan University
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1. Aged between 8 and 12 years old; 2. Myopia increased by at least -0.50D/year in the first 12 months before entering the study; 3. The spherical diopter is between -0.75 and -4.00 D; 4. Astigmatic diopter=0.8 (decimal recording method); 7. The refractive medium of the tested eye is clear; 8. The tested eye has no nystagmus and good fixation ability; 9. The corneal curvature is between 40.00 D and 46.00 D.
Exclusion criteria
Exclusion criteria: 1. Cardiopulmonary insufficiency or systemic diseases; 2. Suffering from intellectual development disorders or mental related diseases; 3. Taking medication; 4. Have a history of eye surgery; 5. Suffering from diseases such as strabismus, glaucoma, cataracts that may affect eye growth and development; 6. Has there been any recent occurrence of eye inflammation, infection, or trauma, severe eye discomfort, or systemic or eye diseases that affect contact lens wearing (such as dry eye syndrome); 7. Have worn contact lenses; 8. Using myopia control measures or preparing to use other myopia control measures; 9. Being or preparing to participate in other lens tests; 10. Shallow anterior chamber or intraocular pressure>20mmHg; 11. Insufficient regulation or aggregation; 12. In a dark environment, the pupil is smaller than the minimum diameter required for measuring 6mm aberration; 13. Due to poor compliance, the researchers believe that it is not appropriate to continue participating in this clinical trial.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| axial length;subjective refraction; | — |
Secondary
| Measure | Time frame |
|---|---|
| objective refraction;corneal endothelial;visual acuity;aberration;accommodative power;corneal topography;relative peripheral refraction; | — |
Countries
China
Contacts
Public ContactLiu Longqian
West China Hospital, Sichuan University
Outcome results
None listed