Refractive error
Conditions
Interventions
experimental group:Alternating wearing single lens and Gemini defocus lenses
Sponsors
Tianjin Eye Hospital
Eligibility
Sex/Gender
All
Age
8 Years to 13 Years
Inclusion criteria
Inclusion criteria: 1) Age: 8-13 years old, gender not limited. 2) Subjective refractive error: -1.00 to -6.00DS, astigmatism = -2.00DC, ball column joint -1.00 to -8.00D. 3) Has a history of wearing glasses for myopia or has previously been confirmed as true myopia but has not been corrected with glasses. 4) Corrective visual acuity VA = 1.0. 5) Wear glasses for at least 12 hours per day.
Exclusion criteria
Exclusion criteria: 1) Any active eye disease or systemic disease affecting the eyes. 2) Wearing or using other myopia prevention and control products: orthokeratology lenses, progressive multifocal lenses, defocusing lenses, atropine drug trials, etc.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Eye axis length; | — |
Secondary
| Measure | Time frame |
|---|---|
| VA vision: naked eye and far vision with glasses;subjective refraction ;MTF;Visual search efficiency;Reading eye movement efficiency; | — |
Countries
CHINA
Contacts
Public ContactXiaoqin Chen; Lihua Li
Tianjin Eye Hospital
Outcome results
None listed