High Myopia
Conditions
Interventions
Defocused spectacle lenses group:wear defocused spectacle lenses
Non-defocused spectacle lenses group:wear non-defocused spectacle lenses
Sponsors
Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital
Eligibility
Sex/Gender
All
Age
8 Years to 14 Years
Inclusion criteria
Inclusion criteria: 1. Aged 8 to 14 years old; 2. Any eye been diagnosed as myopia. After cycloplegia, the spherical equivalent is from -8 to -5 diopter, astigmatism =0.5 diopter; 3. The best corrected visual acuity >=0.8, near visual acuity >=1.0, Titmus stereo vision =1500g; 5. Accept random group assignment and blind study design. The guardians and children who are no younger than 12 years old need to assign written informed consent, while children under 12 years old need oral informed consent.
Exclusion criteria
Exclusion criteria: 1. Any ocular or systemic diseases (e.g. Marfan's syndrome, retinopathy of prematurity, etc.) that may affect vision and refractive development; 2. Patients with xerophthalmia, allergic conjunctivitis, entropion, trichiasis, severe keratoconjunctival infection, keratoconus and other eye diseases; 3. Those who have allergies or contraindications to cycloplegia drugs; 4. Those who had received other treatment for myopia control in the last year, such as atropine and other anticholinergic drugs, orthokeratology, defocused soft contact lens, defocused spectacles, etc; 5. Those who had undergone corneal refractive surgery before; 6. Those with epilepsy or mental disorders who can not communicate normally; 7. Other situations that are judged by the researcher as unsuitable to participate in the research.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Axial Length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Refractive Status; | — |
Countries
China
Contacts
Public ContactXu Xun
Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital
Outcome results
None listed