Myopia of children and adolescents
Conditions
Interventions
Crystal pure light source group:Crystal pure light source irradiation, 4 hours/day
LED light source group:LED light source irradiation, 4 hours/day
Sponsors
Affiliated Hospital of Hebei University
Eligibility
Sex/Gender
All
Age
6 Years to 10 Years
Inclusion criteria
Inclusion criteria: 1. Age range :6-10 years old students, school age and grade matching. 2. Basic visual acuity: naked eye visual acuity or corrected visual acuity is within the normal range (naked eye visual acuity =0.8, or diopter between -0.50D and +2.00D). No high myopia (equivalent spherical lens =-6.00D), amblyopia, strabismus and other serious vision problems. 3. Health status: no congenital or organic eye diseases (such as glaucoma, cataracts, retinopathy, etc.). No systemic diseases (such as diabetes, high blood pressure, immune system disorders, etc.) may affect eye health. 4. Stability of eye environment: no myopia prevention and control interventions such as orthokeratology (OK mirror) and low-concentration atropine have been used in the past 6 months. No eye surgery or medication was planned during the study. 5. Cooperation requirements: Parents and students sign informed consent, commit to full participation in the study and cooperate with regular follow-up. Daily school time >=4 hours, attendance rate >=90% (avoid absence affecting light exposure time).
Exclusion criteria
Exclusion criteria: 1. Eye disease or surgical history: previous ocular trauma and surgical history (such as strabismus correction, refractive surgery, etc.). There is active eye inflammation (e.g. conjunctivitis, keratitis, etc.). 2. Systemic disease interference: suffering from systemic diseases that affect visual development (such as retinopathy of prematurity, Down syndrome, etc.). Long-term use of hormone drugs or immunosuppressants may interfere with eye metabolism. 3. Intervention interference: Unauthorized use of myopia prevention and control products (such as OK glasses, special function glasses, etc.) during the study period. Participate in other vision-related clinical trials or intervention programs. 4. Inconsistent environment or compliance: the actual lighting conditions of the classroom are inconsistent with the requirements of the group (such as the illumination of the test group is not up to standard). Unable to complete follow-up or data collection due to school transfer, long-term leave, etc. 5. Data integrity risk: Missing or abnormal diopter, axial length, or choroid thickness data on baseline examination.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Axis oculi;Diopter;Choroidal thickness; | — |
Countries
China
Contacts
Public ContactChen Peng
Affiliated Hospital of Hebei University
Outcome results
None listed