Ametropia, myopia, farsightedness reserve
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Kindergarten children; 2. Written consent of parents or guardians; 3. The intraocular pressure in both eyes was normal, and there was no strabismus, amblyopia or any other pathological changes in the eyes; 4. No systemic diseases affecting visual development or refractive development, such as diabetes, fibrous tissue lesions, etc.
Exclusion criteria
Exclusion criteria: 1. Inability to understand or cooperate with the study process, with eye exams, and with annual interviews, as judged by the investigator. 2. Participate in or concurrently participate in other clinical trials within 30 days prior to the study. 3. Parents or guardians request withdrawal from the study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Spherical equivalent;Axial length; | — |
Countries
China