myopia
Conditions
Interventions
Experimental group:Wear four-zone multiple segments bifocal defocus lens
Control group:Wear single vision lens
Sponsors
West China Hospital of Sichuan University
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: (1) Age: 8 ~ 12 years old (including 8 and 12 years old); (2) Myopia of both eyes was between -0.75D and -6.00D, and the difference was less than 1.50D; Astigmatism =1.50D; (3) The best corrected visual acuity in both eyes =1.0 (fractional recording); (4) The subjects can come to the hospital regularly for follow-up;
Exclusion criteria
Exclusion criteria: (1) Ocular diseases such as keratitis, pink eye, acute inflammation, glaucoma, strabismus, and nystagmus; (2) Have worn other myopia control methods (such as: orthokeratology lens, multi-focus soft contact lens, red-light therapy, multiple segments defocus glasses, etc.); (3) Participants who have participated in clinical studies to myopia progression; (4) Suffering from mental illness; (5) Suffering from systemic diseases, such as cardiopulmonary insufficiency, diabetes, hypertension, etc (6) Poor compliance, the researchers think it is not appropriate to continue to participate in this clinical trial.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Subjective and objective refraction;Visual acuity;Axial length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Contrast sensitivity;Optical coherence tomography;Visual quality questionnaire;Binocular vision function test;Prism test; | — |
Countries
China
Contacts
Public ContactLiu Longqian
West China Hospital of Sichuan University
Outcome results
None listed