Borroni, Davide 
ORCID: 0000-0001-6952-5647, Gadhvi, Kunal Ajit, Hristova, Rozaliya, McLean, Keri ORCID: 0000-0002-8907-1176, Rocha de Lossada, Carlos, Romano, Vito ORCID: 0000-0002-5148-7643 and Kaye, Stephen ORCID: 0000-0003-0390-0592
(2021)
Influence of Corvis ® ST on intraocular pressure.
Ophthalmology Science, 1 (1).
p. 100003.
Abstract
<h4>Purpose</h4>To investigate the effect of Corneal Visualization Scheimpflug Technology tonometry (CST) on intraocular pressure (IOP).<h4>Design</h4>Cohort study.<h4>Participants</h4>Patients with and without primary open-angle glaucoma (POAG) were included.<h4>Methods</h4>Intraocular pressure was measured using the Icare rebound tonometer (ICRT; Icare Finland Oy) and the biomechanically corrected IOP (bIOP) using the CST. Intraocular pressure was measured at baseline with ICRT, followed by a CST measurement in one eye with the fellow eye acting as a control. Icare measurements were repeated at 10 seconds and 1, 2, 4, 8, 15, 30, and 60 minutes in both eyes. The ratio of test eye IOP to fellow eye IOP was used to control for intrasubject variation.<h4>Main outcome measures</h4>Intraocular pressure change following Corneal Visualization Scheimflug Technology tonometry.<h4>Results</h4>Forty participants (mean age, 54.09 ± 20.08 years) were included comprising 20 patients with POAG and 20 patients with no ocular abnormalities other than cataract. Mean central corneal thickness was similar in those without POAG (547.4 ± 55.05 μm) and with POAG (520.22 ± 37.59 μm; <i>P</i> = 0.14). No significant change was found in IOP measured with the ICRT in the fellow eye versus the 1-hour period in either the healthy (<i>P</i> = 0.87) or POAG (<i>P</i> = 0.92) group. Significant changes were found in IOP after CST measurement for both healthy (<i>P</i> < 0.01) and glaucomatous (<i>P</i> < 0.01) eyes. After the CST measurement, the IOP reduced continuously from a mean of 13.75 mmHg to 10.84 mmHg at 4 minutes for healthy eyes and from 13.28 mmHg to 11.11 mmHg at 8 minutes for glaucomatous eyes before approaching (83% for healthy eyes and 92% POAG eyes) the pre-CST measurement at 1 hour.<h4>Conclusions</h4>Corneal Visualization Scheimpflug Technology tonometry causes a significant reduction in IOP in both glaucomatous and healthy eyes that lasts for at least 1 hour afterward.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Biomechanics, CST, Glaucoma, Intraocular pressure |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 22 Jan 2021 09:35 |
| Last Modified: | 16 Aug 2023 10:16 |
| DOI: | 10.1016/j.xops.2021.100003 |
| Open Access URL: | http://doi.org/10.1016/j.xops.2021.100003 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3114510 |
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