Effect of recipient corneal pathology on Pascal tonometer and Goldmann tonometer readings in eyes after penetrating keratoplasty.

Abstract:

PURPOSE:To assess the influence of recipient corneal pathology on the performance of the Pascal dynamic contour tonometer (PDCT) (Swiss Microtechnology AG) by comparing it to Goldmann applanation tonometry (GAT) in post-penetrating keratoplasty (PKP) eyes. METHODS:Intraocular pressure (IOP) was measured in 40 post-PKP eyes of 40 patients using PDCT and GAT. The study patients were divided into two groups. Group A included patients who had undergone PKP for ectatic corneal disorders (keratoconus, n=20) and group B included patients who had undergone PKP for other non-ectatic corneal disorders (Fuchs, post-corneal ulcer, post-chemical burn,post-trauma, n=20). Keratometric measurements were obtained in all eyes using Orbscan II (Bausch &Lomb) and central corneal thickness (CCT) was measured using Corneo-Gaze Plus (Sonogaze). RESULTS:In group B, a correlation between PDCT and GAT IOP measurements was observed. In group A, GAT IOP measurements were significantly lower than PDCT measurements (3.7 +/- 1.8 mmHg,p<0.001). Additionally, CCT affected GAT IOP measurements much more than PDCT measurements,while corneal curvature did not significantly affect IOP measurements of any instrument in either group. CONCLUSIONS:In post-PKP eyes, PDCT appears to be less influenced than GAT by CCT and pre-existing recipient corneal pathology. Therefore, PDCT may be better suited for monitoring IOP in post-PKP eyes.

journal_name

Eur J Ophthalmol

authors

Papastergiou GI,Kozobolis V,Siganos DS

doi

10.1177/112067211002000104

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

29-34

issue

1

eissn

1120-6721

issn

1724-6016

pii

85C2097C-6C7C-4022-8201-1D196B466355

journal_volume

20

pub_type

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