AIM: To observe the clinical effects of rigid gas permeable contact lens for orthokeratology, evaluate the safety and effectivity of orthokeratology for teenagers, and analyze relevant factors.

METHODS: One hundred and twenty patients(200 eyes, aging from 10 to 18 years old)were followed up for six months. All patients wore night orthokeratology lens after standard optometry for spectacles. The therapeutic effect and complications, subjective feeling were observed.

RESULTS: All patients after six months wearing felt favorable. Uncorrected visual acuity was improved after six months, the difference was significant(P<0.01). Diopters and K value were lower than the past. The difference was significant(P<0.01). There was no significant difference between the ocular axial length, corrected visual acuity of before and after treatment.

CONCLUSION: Orthokeratology lens are safe and effective for treating mild and middle myopia of teenager's. But the further study is needed to ensure the safety and effectivity for long wearing.