Myopia
Conditions
Interventions
Test Group C:Contrast-reducing design lenses
Control group D group:Single Microlens Design Lens (HAL lens)
Test Group B:Two types of microstructure-designed lenses
Test Group A:Three types of microstructure-designed lenses
Sponsors
Eye Hospital, Wenzhou Medical University
Eligibility
Sex/Gender
All
Age
6 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1. Ages 6-12 years old. Consent from the guardian is required in writing. Gender is not restricted; 2. Under dilated eyes, the objective refraction spherical power values were all within the range of -0.50D (inclusive) to -4.50D (inclusive) (based on the average value of the objective refraction examination); and the refractive anisometropia of both eyes after converting to equivalent spherical power was <=1.50D; 3. Astigmatism is less than or equal to 1.50D; 4. Voluntarily participate in this clinical trial, cooperate with the examinations, and sign the informed consent form.
Exclusion criteria
Exclusion criteria: 1. Abnormal intraocular pressure (intraocular pressure 21 mmHg or intraocular pressure difference between both eyes >= 5 mmHg); 2. Oblique individuals; 3. There is a significant abnormality in the function of the eyes' accommodation. 4. Any single eye with the best corrected visual acuity (VA) less than 4.9; 5. Eye diseases that affect visual development (excluding refractive errors) and systemic diseases of the whole body; 6. History of eye or systemic surgeries that affect eye development; 7. Wore orthokeratology lenses, astigmatic soft contact lenses, or used low-concentration atropine eye drops within 1 month; wore OK lenses or other myopia intervention methods (such as red light-related treatment methods) within 3 months. 8. History of systemic medication (drugs that affect growth and development, such as growth hormone); 9. Has participated in any clinical research trials for myopia control within the past month; 10. The researchers believe that there are other circumstances that make someone ineligible to participate in the trial.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Change in Axial length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Sphere power, cylinder power, axis;Changes in contrast sensitivity;change in axial length;Choroidal Thickness; | — |
Countries
China
Contacts
Public ContactWeiwei Lu
Eye Hospital, Wenzhou Medical University
Outcome results
None listed