EVALUATION OF THE EFFECTS OF ORTHOKERATOLOGY ON MYOPIA, ASTIGMATISM IN DA NANG FARGO ORTHO-K CENTER

Objectives: To evaluate the effects of orthokeratology (Ortho-K) on myopia, astigmatism and identify complications during applying the treatment. Methods: This is a prospective study accompanied with a series of case studies and outcome evaluation of 118 eyes of 60 patients who were diagnosed for myopia, astigmatism and were indicated wearing overnight Ortho-K lenses during the time from June 2017 to June 2018. Results: 118 eyes were prescribed wearing overnight Ortho-K lenses and their results were reported as follow: Visiual acuity ≥ 8/10 before the treatment was 1.7%, after one day of the treatment it increased to 3.4%, after 1 week it was 34.7%, after 1 month it was 71.2%, after 3 month it was 87.1% and after 6 months it accounted for 94.7%; Mean spherical equivalent refraction pre-treatment was -4.03D ± 1.70D, after 6 months of the treatment it reduced to - 0.38D ± 0.45D; Residual refraction after 6 months of the treatment ≤ 1.00D accounted for 96.5%; After 1 month of the treatment, 09 eyes (7.6%) were diagnosed for mild keratitis and 109 eyes (92.4%) had normal cornea after the treatment. Conclusions: Our results suggest that orthokeratology is a highly effective and safe treatment for correcting visual acuity in myopic and astigmatic patients. Key words: Myopia, astigmatism, orthokeratology