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

Jacinto Santodomingo-Rubido , César Villa-Collar, Bernard Gilmartin, Ramón Gutiérrez-Ortega

    Research output: Contribution to journalArticlepeer-review


    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.

    Original languageEnglish
    Pages (from-to)5060-5065
    Number of pages6
    JournalInvestigative Ophthalmology and Visual Science
    Issue number8
    Early online date22 Jun 2012
    Publication statusPublished - 31 Jul 2012

    Bibliographical note

    Copyright 2012 The Association for Research in Vision and Ophthalmology, Inc.


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