This prospective study evaluated astigmatic changes in children following lateral rectus surgery. The fellow unoperated eye was used as the control for assessment of anterior and posterior corneal surfaces. The study included 37 patients (74 eyes); 16 male, 21 female and mean age at surgery of 10.3 years (SD3.4). No significant changes were found for central corneal thickness or age with anterior surface corneal astigmatism postoperatively. Surgery did produce a significant change in anterior corneal surface astigmatism with mean vector increase of 0.56D x90, SD X0.23, SD Y0.33. A significant change was seen in posterior corneal surface astigmatism with mean vector change of 0.08D x87, SD X0.08, SD Y0.10. However, these changes were not clinically significant. A significant increase in total astigmatism of the anterior corneal surface was in the radius of the axial curvature of the horizontal meridian at 3 and 3.5mm temporal from the optical corneal apex. Changes indicate horizontal flattening on axial / sagittal front curvature Pentacam maps and vertical steepening were consistent with an increased with-the-rule astigmatism. This persisted at two months postoperative duration.
Corneal surface astigmatism changes after lateral rectus surgery
Reviewed by Fiona Rowe
Corneal changes after larger (9mm) lateral rectus muscle recession measured with Pentacam®.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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