Ametropia
Conditions
Interventions
Control group ( group B ):Wear contrast single-effect lens
Experimental group ( group A ):Wear a defocused contrast double-effect lens
Sponsors
Hangzhou Xihu Zhijiang Eye Hospital
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1. Age 8 ~ 12 years old, regardless of gender; 2. Diopter equivalent spherical degree (objective optometry of compound tropicamide cycloplegia): -0.50 D ~ -6.00 D; astigmatism = 1.0 (decimal vision); 4. Good cognitive ability, can cooperate with the inspection.
Exclusion criteria
Exclusion criteria: 1.Myopia prevention and control products have been used in the past, including functional optical lenses, progressive multifocal lenses, multifocal soft lenses, orthokeratology lenses, low-concentration atropine, light feeders, Chinese medicine myopia prevention and control, visual function training, etc. 2.There are dominant strabismus, amblyopia or other eye diseases that affect visual function. 3.There are systemic diseases or the use of drugs that may affect eye physiology and refractive development. 4.Previous history of ocular surgery or ocular trauma that affects the refractive status of the eye; 5.Only one eye meets the selection criteria. 6.Can 't regularly into the eye inspectors;
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Diopter after ciliary muscle paralysis;axial length;choroidal thickness; | — |
Secondary
| Measure | Time frame |
|---|---|
| Diopter; | — |
Countries
China
Contacts
Public ContactJun Deng
Hangzhou Xihu Zhijiang Eye Hospital
Outcome results
None listed