Title of article :
Orthokeratology in Moderate Myopia: A Study of Predictability and Safety
Author/Authors :
Singh, Kirti Guru Nanak Eye Centre - Maharaja Ranjit Singh Marg - New Delhi - India , Bhattacharyya, Mainak Guru Nanak Eye Centre - Maharaja Ranjit Singh Marg - New Delhi - India , Goel, Abhishek Guru Nanak Eye Centre - Maharaja Ranjit Singh Marg - New Delhi - India , Arora, Ritu Guru Nanak Eye Centre - Maharaja Ranjit Singh Marg - New Delhi - India , Gotmare, Nikhil Guru Nanak Eye Centre - Maharaja Ranjit Singh Marg - New Delhi - India , Aggarwal, Himshikha Guru Nanak Eye Centre - Maharaja Ranjit Singh Marg - New Delhi - India
Pages :
8
From page :
210
To page :
217
Abstract :
Purpose: Literature is relatively silent on safety profile and predictability of orthokeratology lenses in terms of myopia correction and prevention of further progression, especially in semi-tropical countries; this study was designed to fill this gap. Methods: This prospective, intervention case series enrolled 30 eyes of 30 patients with myopia up to –5.5 diopters (D). Patients were randomized into two groups of 15 each; the study group was prescribed overnight orthokeratology (OK) lenses, while the control group used daily wear conventional soft contact lenses. Follow-up examinations were performed after 1 h and 6 h, and then at 1, 7, 15, 30 days, and 4 months post lens wear. Uncorrected visual acuity (UCVA), contrast sensitivity, keratometry, central corneal thickness (CCT), and tear film break up time (TBUT) were evaluated at each follow-up examination. Results: All patients attained a visual acuity of 0.00 Logarithm of the Minimum Angle of Resolution (logMAR) after one week of lens use, which was maintained throughout the study period. While patients allotted to the study group had a gain of 8.1 Snellen lines (UCVA), those in the control group gained 8.9 lines (BCVA) at the end of follow-up period. In the OK group, cornea showed a flattening of 0.8 D (mean keratometry) after single overnight usage of OK lens and overall flattening of 1.2 D compared to baseline, at the end of four months. The change in contrast sensitivity, corneal endothelial specular count, axial length and tear film status was not significant in either group. Conclusion: Orthokeratology is an effective and safe modality to correct moderate myopia in motivated young adults. No side effects were encountered after a short-term follow-up in participants who resided in semi-tropical environments.
Keywords :
Contact Lens , Overnight Wear , Orthokeratology , Moderate Myopia , Semi-tropical Environments
Journal title :
Journal of Ophthalmic and Vision Research
Serial Year :
2020
Record number :
2523048
Link To Document :
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