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Title: Discontinuation of orthokeratology on eyeball elongation (DOEE)
Authors: Cho, P 
Cheung, SW
Issue Date: 2017
Publisher: British Contact Lens Association
Source: British Contact Lens Association 40th Clinical Conference & Exhibition, 2017 How to cite?
Abstract: Purpose: To compare changes in axial elongation, over a 14-month period, in subjects who discontinued and then resumed ortho-k lens wear with those who continued to wear their lenses or spectacles following a 2-year myopia control study.
Method: Subjects who had just completed a 2-year myopia control study were recruited and classified as follows: Control Group: control subjects who continued to wear spectacles; OKc Group: ortho-k subjects who continued ortho-k lens wear for the duration of the study; and OKd Group: subjects who discontinued lens wear for seven months and wore single-vision spectacles (Phase I (ceaselens-wear phase)) and then resumed ortho-k lens wear for another seven months (Phase II (resumed-lens-wear phase)). Axial lengths were measured at scheduled visits using the IOLMaster.
Results: A total of 44 subjects (13, 16, and 15 Control, OKc, and OKd subjects, respectively), aged 8-14 years, completed the study. Axial elongation in OKd subjects in Phase I was significantly faster (Mean±SE: 0.153 ±0.021 mm) than in the Control (0.082±0.022 mm) or OKc (0.087±0.020 mm) subjects (Control vs OKd, p = 0.027; OKc vs OKd, p = 0.030), but on resuming lens wear in Phase II, the rate of axial elongation was no longer significantly different from the other two groups (p>0.05).
Conclusion: At or before the age of 14 years, stopping ortho-k lens wear led to a more rapid increase in axial length which was comparable to those wearing spectacles during the initial 2-year myopia control study. The rate of increase in this cease-lens wear phase was greater than the rates observed in the Control and OKc groups in the same phase of this study. Axial elongation slowed again with resumed lens wear after six months.
Description: British Contact Lens Association 40th Clinical Conference & Exhibition, Liverpool, UK, 9-11 June, 2017
Appears in Collections:Conference Paper

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