Myopia
Conditions
Interventions
group HAL:HAL lens
group history control:single vision lenses
Sponsors
Eye Hospital of Wenzhou Medical University
Eligibility
Sex/Gender
All
Age
13 Years to 18 Years
Inclusion criteria
Inclusion criteria: 1.Aged 13 to 18 years; 2.Spherical refractive error of -0.75 to -8.00 D in each eye (spherical equivalent), as measured by cycloplegic autorefraction; 3.Cylindrical component of the refractive error within the range of [-3.00 to 0.00 D] in both eyes;.Anisometropia = 0.9 as Snellen) ; 5.No strabismus by cover test at near and distance; 6.Ability to follow protocol to obtain reliable research measurements. 7.Absence of ocular disease with full ophthalmic examination, such as retinal disease, cataract and ptosis. Good general health, without systemic or neurodevelopmental conditions. Without ocular or systemic medicine, which might affect myopia progression or visual acuity through known effects on retina, accommodation or significant elevation of intraocular pressure.
Exclusion criteria
Exclusion criteria: 1. Age: less than 13 years old or greater than 18 years. 2. Spherical refractive error: less than -0.75 D or greater than -8.00 D in each eye (spherical equivalent), as measured by cycloplegic autorefraction; 3. Cylindrical component of the refractive error worse than -3.00 D in both eyes;Anisometropia > 2.50 D on sphere equivalent. 4. Best corrected visual acuity of less than 0.05 LogMAR (= 0.8 as Snellen) 5. With strabismus by cover test at near or distance. 6. Failure to follow protocol to obtain reliable research measurements 7.acuity through known effects on retina, accommodation or significant elevation of intraocular pressure.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Cycloplegic-autorefraction ;axial length; | — |
Countries
China
Contacts
Public ContactLi Xue
Eye Hospital of Wenzhou Medical University
Outcome results
None listed