Myopia control with orthokeratology contact lenses in Spain (MCOS):refractive and biometric changes


PURPOSE. To compare axial length growth between white children with myopia wearing orthokeratology contact lenses (OK) and distance single-vision spectacles (SV) over a 2-year period. METHODS. Subjects 6 to 12 years of age with myopia -0.75 to -4.00 diopters of sphere (DS) and astigmatism ≤1.00 diopters of cylinder (DC) were prospectively allocated OK or SV correction. Measurements of axial length (Zeiss IOLMaster), corneal topography, and cycloplegic refraction were taken at 6-month intervals. RESULTS. Thirty-one children were fitted with OK and 30 with SV. Following 24 months, axial length increased significantly over time for both the OK group (0.47 mm) and SV group (0.69 mm; P < 0.001), with a significant interaction between time and group (P = 0.05) reflecting a greater increase in the SV group. Significant differences in refraction were found over time, between groups and for the interaction between time and group for spherical (all P < 0.001) but not cylindrical components of refraction (all P > 0.05). Significantly greater corneal flattening was evident in the OK group for the flatter and steeper corneal powers and for corneal shape factor (all P ≤0.05). CONCLUSIONS. Orthokeratology contact lens wear reduces axial elongation in comparison to distance single-vision spectacles in children.

Divisions: College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
Additional Information: Copyright 2012 The Association for Research in Vision and Ophthalmology, Inc.
Publication ISSN: 1552-5783
Last Modified: 30 Nov 2023 08:04
Date Deposited: 07 Aug 2012 10:57
Full Text Link: 10.1167/iovs.11-8005
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://www.iovs ... ntent/53/8/5060 (Publisher URL)
PURE Output Type: Article
Published Date: 2012-07-31
Published Online Date: 2012-06-22
Authors: Santodomingo-Rubido, Jacinto
Villa-Collar, César
Gilmartin, Bernard
Gutiérrez-Ortega, Ramón

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