https://doi.org/10.4081/optometry.2014.1846
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Effect of lotrafilcon A silicone hydrogel contact lens on intraocular pressure measurement

Authors

Carlos García-Resúa
Department of Applied Physics - Optometry Group, University of Santiago de Compostela, Spain.
Silvia García-Montero
Department of Applied Physics - Optometry Group, University of Santiago de Compostela, Spain.
Hugo Pena-Verdeal
Department of Applied Physics - Optometry Group, University of Santiago de Compostela, Spain.
Jorge Gilino
Department of Applied Physics - Optometry Group, University of Santiago de Compostela, Spain.
Eva Yebra-Pimentel
Department of Applied Physics - Optometry Group, University of Santiago de Compostela, Spain.
Maria J. Giráldez
mg.giraldez.mj@gmail.com
Department of Applied Physics - Optometry Group, University of Santiago de Compostela, Spain.
The present paper aims to assess the effect of lotrafilcon A contact lenses (CL) in situ on intraocular pressure (IOP) measurement performed with three portable tonometers (ICare, Tonopen and Perkins). This cross-sectional study included thirty young healthy subjects. Intraocular pressure measurements without CL were performed first, followed by IOP measurements with CL for twenty minutes. ICare IOP measurements obtained with lotrafilcon A CL overestimated IOP values without CL by 1 mmHg (P<0.001). However, both techniques displayed close level of agreement (95% LoA, -4.17 to +1.63 mmHg). Also, differences between both methods tended not to increase (P=0.9). No significant differences were observed between IOP measurements without and with CL for Perkins (paired-t test, P=0.23) and Tonopen XL (pairedt test, P=0.17). In conclusion, adequate IOP measurements through zero power lotrafilcon A silicone hydrogel CL can be obtained with all three tonometers in healthy eyes, although, in case of ICare, the practitioner must be aware of the 1 mmHg overestimation with CL.

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Supporting Agencies

this study was funded in part by the Carlos III Health Institute (of the Spanish Ministry of Health) through grant FIS-PI 10/01098
Carlos García-Resúa, Department of Applied Physics - Optometry Group, University of Santiago de Compostela
Fisica Aplicada (Optometry group)
Silvia García-Montero, Department of Applied Physics - Optometry Group, University of Santiago de Compostela
Fisica Aplicada (Optometry group)
Hugo Pena-Verdeal, Department of Applied Physics - Optometry Group, University of Santiago de Compostela
Fisica Aplicada (Optometry group)
Jorge Gilino, Department of Applied Physics - Optometry Group, University of Santiago de Compostela
Fisica Aplicada (Optometry group)
Eva Yebra-Pimentel, Department of Applied Physics - Optometry Group, University of Santiago de Compostela
Fisica Aplicada (Optometry group)
Maria J. Giráldez, Department of Applied Physics - Optometry Group, University of Santiago de Compostela
Fisica Aplicada Department (Optometry group)

How to Cite

García-Resúa, C., García-Montero, S., Pena-Verdeal, H., Gilino, J., Yebra-Pimentel, E., & Giráldez, M. J. (2014). Effect of lotrafilcon A silicone hydrogel contact lens on intraocular pressure measurement. Optometry Reports, 4(1). https://doi.org/10.4081/optometry.2014.1846

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