Effectiveness and safety of overnight orthokeratology with Boston XO2 high-permeability lens material: A 24 week follow-up study.
OBJECTIVE
To examine the effectiveness of overnight orthokeratology lenses made with Boston XO2, highly gas-permeable lens material for the temporary correction of myopia.


METHODS
Myopic individuals from 9 to 62 years of age were eligible. Participants ≤ 12 years of age were required to have myopia ≤-4.00 D and astigmatism ≤ 1.50 D, and for those 13-62 years of age myopia ≤-5.00 D and astigmatism ≤ 3.00 D. All participants were required to have normal healthy eyes and not be receiving any ocular medications or systemic medications likely to affect the results of visual acuity. Participants wore the lenses for a minimum of 7h during sleep, and were evaluated on day 1 and weeks 1, 2, 4, 12, and 24. Success was defined as LogMAR ≤ 0.1.


RESULTS
A total of 126 participants (63.5% females) with a mean age of 20.4 ± 11.5 years were recruited. Baseline LogMAR, and vertical and horizontal corneal curvature were 0.8, 7.7 mm, and 7.9 mm, respectively, in both eyes. A consistent decrease in LogMAR was noted from day 1 to week 12. The success rate increased with length of time (from 33.9% to 100% for the right eye and from 35.5% to 100% for the left eye from day 1 to week 24). No severe complications were noted.


CONCLUSIONS
Overnight orthokeratology with lenses made of Boston XO2 material are effective and safe for the temporary reduction of myopia.
Mackay Memorial Hospital, Department of Ophthalmology, Taipei, Taiwan; Chung Shan Medical University, Department of Optometry, Taichung, Taiwan.
Huey-Chuan
HC
Cheng
Tri-Service General Hospital, Department of Ophthalmology, Taipei, Taiwan.
Jy-Been
JB
Liang
National Taiwan University of Science and Technology, Department of Chemical Engineering, Taipei, Taiwan; Central Taiwan University of Science and Technology, Department of Optometry, Taichung, Taiwan.
Wen-Pin
WP
Lin
Central Taiwan University of Science and Technology, Department of Optometry, Taichung, Taiwan. Electronic address: richard.wu@taipeieyeclinic.com.tw.
Richard
R
Wu
D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D002648:Child; D003261:Contact Lenses; D003315:Cornea / Q000473:pathology*; D019781:Corneal Topography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D009216:Myopia / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D054158:Orthokeratologic Procedures / Q000379:methods*; D012029:Refraction, Ocular / Q000502:physiology*; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult
Cornea; Gas-permeable; Lens; Myopia; Orthokeratology