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Reliability of Intraocular Pressure Measurement by Goldmann Applanation Tonometry After Refractive Surgery: A Review of Different Correction Formulas

Authors De Bernardo M, Cembalo G, Rosa N

Received 28 May 2020

Accepted for publication 27 July 2020

Published 24 September 2020 Volume 2020:14 Pages 2783—2788

DOI https://doi.org/10.2147/OPTH.S263856

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Scott Fraser


Maddalena De Bernardo, Giovanni Cembalo, Nicola Rosa

Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana”, University of Salerno, Baronissi, Salerno, Italy

Correspondence: Maddalena De Bernardo
Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana”, University of Salerno, Via Salvador Allende, Baronissi 84081, SA, Italy
Tel +39089 965063
Fax +39 089672407
Email mdebernardo@unisa.it

Abstract: Myopia is one of the main risk factors for the onset of open-angle glaucoma. One of the first steps to assess glaucoma occurrence is the measurement of the intraocular pressure (IOP) by the Goldmann applanation tonometry (GAT). Even if this device is considered to be the gold standard for such measurements, it is affected by several sources of errors. Among these, there are the corneal thickness and curvature, both modified by corneal refractive surgery (CRS), that nowadays has become a very popular method to treat refractive errors. Indeed, CRS, by modifying the corneal shape and structure, causes an underestimation of the IOP measurements. In the literature, several IOP correction formulas to utilize with different devices have been proposed to overcome this problem. This paper aims to review the various correction formulas applied to the GAT in the attempt to improve the reliability of this measurement.

Keywords: IOP measurement, corneal refractive surgery, GAT, laser in situ keratomileusis, photorefractive keratectomy

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