myopia
Conditions
Interventions
group 1:Common frame glasses
group 2:Peripheral defocus frame glasses
Sponsors
Yongchuan Hospital of Chongqing Medical University
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1. Aged 8-12 years, with the written consent of the guardian, no gender limit; 2. The equivalent spherical diopter of objective optometry under mydriasis of both eyes is between -0.75 D (inclusive) and -4.75D (inclusive), the astigmatism is less than or equal to 1.50D, and the anisometropia of both eyes after the equivalent spherical lens is <= 1.00D; 3. The best corrected visual acuity of binocular subjective optometry is greater than or equal to 1.0; 4. Volunteer to participate in this clinical trial and sign the informed consent form; 5. Emmetropia children with diopters -0.50D<SE<+0.50D.
Exclusion criteria
Exclusion criteria: 1. Have a history of ocular trauma or intraocular surgery; 2. Clinically significant slit lamp findings; 3. Abnormal intraocular pressure (intraocular pressure 21 mmHg or bilateral intraocular pressure difference >= 5 mmHg); 4. Patients with other eye diseases, such as uveitis and other inflammation, glaucoma, cataract, fundus disease, eye tumor, eye trauma, and dominant strabismus; And any eye disease affecting visual function; 5. Patients with systemic diseases that cause low immunity (such as acute and chronic sinusitis, diabetes, Down's syndrome, rheumatoid arthritis, psychotic patients or other diseases that researchers think are not suitable for wearing glasses); 6. Those who have participated in drug clinical trials within three months, or/and have used any myopia control products, such as specially designed myopia control lenses such as corneal shaping lenses, multifocal contact lenses, progressive multifocal lenses, atropine drugs, etc; 7. Only one eye meets the inclusion criteria; 8. Those who cannot perform eye examination regularly; 9. Dominant strabismus; 10. Those who cannot be selected as determined by the researcher.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| axial length;choroidal thickness;diopter; | — |
Secondary
| Measure | Time frame |
|---|---|
| choroidal blood flow; | — |
Countries
China
Contacts
Public ContactLi Hua
Yongchuan Hospital of Chongqing Medical University
Outcome results
None listed