Myopia
Conditions
Interventions
Group 1 (Newly designed special aspherical orthokeratology lens) (eyes):none
Group 2 (Spherical orthokeratology lens designed by VST) (eyes):none
Group 3 (Aspherical orthokeratology lens designed by VST) (eyes):none
Sponsors
Peking University Third Hospital
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1. Age: 8 to 12 years old, with no gender restriction. 2. Spherical power: -0.75D to -6.00D, with with-the-rule astigmatism = 1.0. 4. All participants are first-time wearers of orthokeratology lenses. 5. Daily wear of the orthokeratology lenses for 6 to 8 hours. 6. Continuous treatment with at least 1 year of follow-up. 7. No use of other myopia treatment methods that may interfere with the treatment results, such as combined use of atropine.
Exclusion criteria
Exclusion criteria: 1. Poor compliance, which may hinder the smooth progress of the study. 2. Presence of systemic diseases such as diabetes or hypertension that may cause ocular complications. 3. History of ocular surgery or other eye diseases. 4. Abnormal intraocular pressure. 5. Abnormal corneal endothelial cells. 6. If the subject shows severe lens decentration on topography examination one or two weeks after receiving the orthokeratology lenses, and has a pupil diameter greater than 4.7mm in bright conditions, or has low scores on subjective visual quality questionnaires and objective visual quality assessments. 7. Patients with keratoconus. 8. Other conditions deemed unsuitable for inclusion by the physician.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| axial length; | — |
Secondary
| Measure | Time frame |
|---|---|
| equivalent spherical power;Kf, Ks; | — |
Countries
China
Contacts
Public ContactHuibin Lv
Peking University Third Hospital
Outcome results
None listed