Myopia
Conditions
Interventions
Test group 1:Use Distant-image Screen and wear single-vision spectacle
Test group 2:Use Distant-image Screen and wear peripheral defocus spectacle
Control group 1:Wear single-vision spectacle
Control group 2:Wear peripheral defocus spectacle
Sponsors
West China Hospital, Sichuan University
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1)Willing to wear single-vision spectacle, or peripheral defocus spectacle, or use distant-image screen, or combination; 2) Age 8-12 years old,male or female; 3)Cycloplegic spherical refraction of -0.50 to -6.00D, astigmatism <= 2.50 D by autorefraction 4)No more than 2.50 D difference in spherical equivalent between the two eyes 5)Best corrected distance and near visual acuity is 1.0 or better; 6)The subjects and guardians could understand the purpose of this study, and all subjects and guardians sign informed consent. Subjects can cooperate with the visit and related examination.
Exclusion criteria
Exclusion criteria: 1)The subjects suffer from tumors, heart disease (including electronic devices implanted in the body, such as cardiac pacemakers, etc.), severe liver and kidney diseases, epilepsy, autoimmune diseases, mental diseases, etc.; or systemic lesions that affect your vision 2) The subjects suffer from ta systemic disease or syndrome that may cause severe myopia (such as Marfan syndrome, etc.) 3)Narrow Angle, shallow anterior chamber or intraocular pressure > 21mmHg 4)Suffer from macular disease, moderate to severe dry eye, corneal disease, cataract, vitreoretinal disease, infectious conjunctivitis, uveitis, optic nerve damage, congenital optic nerve dysplasia or other eye diseases 5)History of eye trauma, eye surgery, amblyopia 6)Constant strabismus or accommodative dysfunction 7)Allergic to cycloplegic agents 8)Use any means of myopia control within 1 month (including but not limited to orthokeratology, low-concentration atropine eye drops, peripheral defocusing spectacles, multi-focal soft lenses, multi-focal RGP, distant-image screen, low intensity red light, etc.) 9)Wear soft contact lenses within 7 days or RGP lenses (including orthokeratology lenses) within 1 month 10)The subjects who are not expected to comply well with the study protocol during the study 11)Other conditions deemed unsuitable for inclusion by the researchers
Design outcomes
Secondary
| Measure | Time frame |
|---|---|
| Choroidal thickness;Choroidal vascular index and perfusion;Accomadation function;Slit lamp;Fundus examination; | — |
Primary
| Measure | Time frame |
|---|---|
| Axial length;refractive error diopter; | — |
Countries
China
Contacts
Public ContactLongqian Liu
West China Hospital, Sichuan University
Outcome results
None listed