Effect of lotrafilcon A silicone hydrogel contact lens on intraocular pressure measurement


https://doi.org/10.4081/optometry.2014.1846
Vol. 4 No. 1 (2014)
Submitted: 29 July 2013
Accepted: 24 December 2013
Published: 28 July 2014
intraocular pressure, silicone hydrogel contact lens, elasticity, portable tonometer, ICare
Abstract Views: 1321
PDF: 578
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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.

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)

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

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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