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Scleral lens influence on corneal curvature and pachymetry in keratoconus patients.
- Source :
-
Contact lens & anterior eye : the journal of the British Contact Lens Association [Cont Lens Anterior Eye] 2015 Aug; Vol. 38 (4), pp. 294-7. Date of Electronic Publication: 2015 Apr 10. - Publication Year :
- 2015
-
Abstract
- Objectives: To investigate the influence of full scleral lenses on corneal curvature and pachymetry in keratoconus patients.<br />Methods: In this intervention study, 20 eyes of 14 patients were measured by Scheimpflug imaging (Pentacam HR, Oculus) at two time points: directly and ≥1 week after scleral lens removal. Steep, flat and maximal keratometry (K(steep), K(flat) and K(max)) and optical pachymetry were analyzed. A generalized estimating equation analysis was performed to correct for paired eyes.<br />Results: Directly after scleral lens removal, all three curvature parameters were significantly flatter compared to ≥1 week after scleral lens removal. Average K(steep) was 0.7 diopter (D) lower (P<0.001), average K(flat) was 0.5D lower (P=0.037) and average K(max) was 1.1D lower (P<0.001). Directly after scleral lens removal, average optical pachymetry was ±2.5% higher (P<0.001) compared to ≥1 week after scleral lens removal.<br />Conclusions: Although scleral lenses do not mechanically touch the cornea, curvature and pachymetry seem to be influenced by scleral lens wear in keratoconus patients. The duration of these changes remain unclear.<br /> (Copyright © 2015 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1476-5411
- Volume :
- 38
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Contact lens & anterior eye : the journal of the British Contact Lens Association
- Publication Type :
- Academic Journal
- Accession number :
- 25865408
- Full Text :
- https://doi.org/10.1016/j.clae.2015.03.006