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Singh K, Bhattacharyya M, Goel A, Arora R, Gotmare N, Aggarwal H. Orthokeratology in Moderate Myopia: A Study of Predictability and Safety. JOVR [Internet]. 2020Apr.6 [cited 2024Apr.26];15(2):210–217. Available from: https://knepublishing.com/index.php/JOVR/article/view/6739

https://doi.org/10.18502/jovr.v15i2.6739

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  • Cited by 5 articles

authors

  • Kirti Singh

    Kirti Singh

    Guru Nanak Eye Centre, Maharaja Ranjit Singh Marg, New Delhi, India
  • Mainak Bhattacharyya

    Mainak Bhattacharyya

    Guru Nanak Eye Centre, Maharaja Ranjit Singh Marg, New Delhi, India
    https://orcid.org/0000-0002-0571-5764
  • Abhishek Goel

    Abhishek Goel

    Guru Nanak Eye Centre, Maharaja Ranjit Singh Marg, New Delhi, India
  • Ritu Arora

    Ritu Arora

    Guru Nanak Eye Centre, Maharaja Ranjit Singh Marg, New Delhi, India
  • Nikhil Gotmare

    Nikhil Gotmare

    Guru Nanak Eye Centre, Maharaja Ranjit Singh Marg, New Delhi, India
  • Himshikha Aggarwal

    Himshikha Aggarwal

    Guru Nanak Eye Centre, Maharaja Ranjit Singh Marg, New Delhi, India

Published Date

  • Apr 6, 2020
This journal is publishing all the articles under Creative Commons Attribution License CC BY 4.0.

Orthokeratology in Moderate Myopia: A Study of Predictability and Safety

Journal of Ophthalmic and Vision Research (JOVR) / April–June 2020, Volume 15, Issue 2 / Pages 210–217

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

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