Comparison of intraocular pressure measurement with Scheimpflug‑based noncontact tonometer with and without hydrogel contact lenses.
Loading...
Date
2015-04
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Objectives: The objective was to determine the repeatability of intraocular pressure (IOP) measurements
made through a soft contact lens (CL) using the Scheimpflug noncontact tonometry in healthy subjects.
Methods: This prospective, randomized, single‑center study included one eye of 88 subjects (40 male and
48 female). Only participants without glaucoma or any other ocular pathology were included in this study.
Three consecutive IOP measurements by the Scheimpflug noncontact tonometry were performed with
and without daily disposable hydrogel CLs (−0.50 DS) (Dailies‑nelfilcon A, 69% water, 8.7 mm base curve,
14 mm diameter, center thickness 0.10 mm) by a single operator. To avoid any bias arising from diurnal
variation, all measurements were made at a similar time of day (11 am ± 1 h). The repeatability of IOP
measurements using the Scheimpflug noncontact tonometry with and without CLs was evaluated using
Pearson’s correlation analysis. Bland–Altman plotting was used to assess the limits of agreement between
the measurements with and without CLs. Results: The mean (± standard deviation) IOPs with and without
CL were 13.80 ± 2.70 and 13.79 ± 2.54 mm of Hg respectively. The mean difference was 0.01 ± 0.16 (95%
confidence interval, +1.97 to − 2.00) mm Hg. Statistical analysis via paired t‑test showed no statistical
difference between the two groups with (P = 0.15). A good correlation was found for IOP measurements
with and without CL (r = 0.93, P < 0.001). Good test‑retest reliability was found when IOP was measured
with and without CL. Conclusion: There was no significant difference between IOP measured with and
without CLs by Scheimpflug noncontact tonometry.
Description
Keywords
Contact lens, Corvis ST, intraocular pressure
Citation
Kumar Mukesh, Shetty Rohit, Jayadev Chaitra, Dutta Debarun, Nicolsan Maneck D, Nagaraj Sriharsha, Kumar Rajesh S. Comparison of intraocular pressure measurement with Scheimpflug‑based noncontact tonometer with and without hydrogel contact lenses. Indian Journal of Ophthalmology. 2015 Apr; 63(4): 323-326.