Does Refractive Error Change Twice as Fast as Corneal Power in Orthokeratology?
- 1 September 1977
- journal article
- Published by Wolters Kluwer Health in Optometry and Vision Science
- Vol. 54 (9) , 581-587
- https://doi.org/10.1097/00006324-197709000-00001
Abstract
We analyzed data from 4 orthokeratology studies of refractive error change (deltaRE) and keratometer-reading change (deltaK). Instead of the reported deltaRE/deltaK ratio of 2:1, we calculated from linear-regression analysis a ratio (slope) of 2:3. The ordinate intercept of the straight line fitted to the data (N = 181 eyes) indicates that when deltaK = 0, deltaRE = 0.72. The correlation between deltaK and deltaRE is poor (+0.63). Causes and interpretations of these results are discussed.Keywords
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