Myopia
Conditions
Interventions
Group1:Phase I: the spectacle lens designed to modify relative peripheral defocus
Phase II: single optical lens.
Group2:Phase I: single optical lens
Phase II: the spectacle lens designed to modify relative peripheral defocus.
Sponsors
Eye Hospital of Wenzhou Medical University, Hangzhou
Eligibility
Sex/Gender
All
Age
8 Years to 13 Years
Inclusion criteria
Inclusion criteria: 1. Aged 8 to 13 years; 2. Spherical refractive error of -0.75 to -4.75 D in each eye (spherical equivalent), as measured by 3. Cycloplegic autorefraction. 4. Astigmatism of not more than 1.50 D. 5. Anisometropia of not more than 1.00 D. Best corrected visual acuity of equal or better than 0.05 LogMAR (= 0.9 as Snellen)
Exclusion criteria
Exclusion criteria: 1. With strabismus by cover test at near or distance; 2. Vertical phoria; 3. Presence of any ocular disease that would influence refractive development, such as retinal disease, cataract and ptosis; 4. Presence of systemic or neurodevelopmental conditions that may influence refractive development; 5. Use of ocular or systemic medicine, which might affect myopia progression or visual acuity through known effects on retina, accommodation or significant elevation of intraocular pressure; 6. Prior use of PALs or bifocal use or prior use of contact lenses.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Axial length;Cycloplegic autorefraction; | — |
Secondary
| Measure | Time frame |
|---|---|
| Subjective refraction;Visual acuity; | — |
Countries
China
Contacts
Public ContactLijie Hou
Hangzhou Branch of Eye Hospital Affiliated to Wenzhou Medical University
Outcome results
None listed