Effect of dry eye on Scheimpflug imaging of the cornea and elevation data.

Autor: Asena L; Department of Ophthalmology, Baskent University Faculty of Medicine, Ankara, Turkey. Electronic address: leylaerk@yahoo.com., Altınörs DD; Department of Ophthalmology, Baskent University Faculty of Medicine, Ankara, Turkey., Cezairlioğlu Ş; Department of Ophthalmology, Baskent University Faculty of Medicine, Ankara, Turkey., Bölük SO; Mayagoz Eye Hospital, Ankara, Turkey.
Jazyk: angličtina
Zdroj: Canadian journal of ophthalmology. Journal canadien d'ophtalmologie [Can J Ophthalmol] 2017 Jun; Vol. 52 (3), pp. 313-317. Date of Electronic Publication: 2017 Jan 10.
DOI: 10.1016/j.jcjo.2016.11.005
Abstrakt: Objective: To evaluate the effect of dry eye on Scheimpflug imaging of the cornea and elevation data.
Design: Prospective observational study.
Participants: Scheimpflug images of 50 patients with dry eye who were being tested for eligibility for corneal refractive surgery were screened. Twelve eyes of 12 patients with abnormal Belin/Ambrosio enhanced ectasia display (BAD) anterior elevation difference were included in the study. The patients had no history of contact lens wear or any other sign of ectasia.
Methods: Peak central corneal densitometry value, corneal volume, pachymetry at the thinnest point, and BAD anterior elevation difference value at the centre of the 9 mm zone were recorded before and after 4 weeks of dry eye treatment. Measurements were compared with the Wilcoxon signed rank test.
Results: The mean corneal peak densitometry and volume were similar before and after therapy (p = 0.465 and p = 0.441, respectively). The mean anterior elevation difference value at the centre of the 9 mm zone before treatment (6.67 ± 1.72 µm) was significantly higher than the mean post-treatment value (4.00 ± 1.48 µm) (p = 0.002). The mean pachymetry at the thinnest location after treatment (548 ± 11.0) was significantly higher than the pretreatment value (538 ± 8.5) (p = 0.027).
Conclusions: BAD anterior elevation differences and pachymetric measurements may be affected by ocular surface or tear film abnormalities associated with dry eye disease. Repeated evaluations after treatment may reveal normal results.
(Copyright © 2017 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: