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Comparison of Intraocular Pressure as Measured by Three Different Non-contact Tonometers and Goldmann Applanation Tonometer for Non-glaucomatous Subjects

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Author(s)
Seung Pil BangChong Eun LeeYu Cheol Kim
Keimyung Author(s)
Kim, Yu CheolLee, Chong Eun
Department
Dept. of Ophthalmology (안과학)
Journal Title
BMC Ophthalmology
Issued Date
2017
Volume
17
Issue
1
Keyword
Central corneal thicknessGoldmann applanation tonometerIntraocular pressureNon-contact tonometer
Abstract
BACKGROUND:

To compare the measurement of intraocular pressure (IOP) among the three different non-contact tonometers (NCT) and the Goldmann applanation tonometer (GAT) for non-glaucomatous subjects.

METHODS:

In 52 eyes of 52 non-glaucomatous subjects, IOP was measured sequentially with the Canon TX-20P, the Nidek NT-530P, the Topcon CT-1P, and the GAT at the same time. We evaluated the IOP-measurement agreement among the tonometers as well as the factors affecting the measurements.

RESULTS:

A significant positive correlation was shown between the IOP values obtained with GAT and each NCT. The Canon TX-20P showed statistically the most significant agreement with the GAT (ICC 0.906, 95% CI 0.837-0.946). In an analysis of the Bland-Altman plots, the Canon TX-20P also showed the largest mean bias (1.38 mmHg) but the narrowest limits of agreement (LoA) (95% LoA; ± 3.43 mmHg). The Topcon CT-1P showed the smallest mean bias (0.48 mmHg) but the widest LoA (95% LoA; ± 4.16 mmHg). The Topcon CT-1P and Nidek NT-530P both showed a significantly positive correlation between increasing central corneal thickness (CCT) and increasing IOP.

CONCLUSION:

There was a statistically significant correlation between each of the three different NCT and the GAT measurements. IOP measured with the Canon TX-20P and Topcon CT-1P tended to be higher, and with the Nidek NT-530P lower, than with the GAT. Practitioners need to know the properties of their own NCTs and their respective measurement tendencies.
Keimyung Author(s)(Kor)
김유철
이종은
Publisher
School of Medicine (의과대학)
Citation
Seung Pil Bang et al. (2017). Comparison of Intraocular Pressure as Measured by Three Different Non-contact Tonometers and Goldmann Applanation Tonometer for Non-glaucomatous Subjects. BMC Ophthalmology, 17(1), 199–199. doi: 10.1186/s12886-017-0593-1
Type
Article
ISSN
1471-2415
DOI
10.1186/s12886-017-0593-1
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/41151
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Ophthalmology (안과학)
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