Brief ReportIntraocular Pressure Measurement in Patients Wearing Filtering Facepiece MasksQuaranta, Luciano MD, PhD*; Micheletti, Eleonora MD*; Riva, Ivano MD†; Weinreb, Robert N. MD‡Author Information *Department of Surgical & Clinical, Diagnostic and Pediatric Sciences, Section of Ophthalmology, University of Pavia—IRCCS Fondazione Policlinico San Matteo, Pavia †IRCCS—Fondazione Bietti, Rome, Italy ‡Shiley Eye Center and Department of Ophthalmology, Hamilton Glaucoma Center, University of California San Diego (UCSD), La Jolla, CA Disclosure: The authors declare no conflict of interest. Reprints: Luciano Quaranta, MD, PhD, Department of Surgical & Clinical, Diagnostic and Pediatric Sciences, Section of Ophthalmology, University of Pavia—IRCCS Fondazione Policlinico San Matteo, Piazzale Golgi 2, Pavia 27100, Italy (e-mail: email@example.com). Journal of Glaucoma: October 2020 - Volume 29 - Issue 10 - p 999-1000 doi: 10.1097/IJG.0000000000001640 Buy Metrics Abstract Ophthalmological examination requires a strict contact between caregivers and patients. In the COVID-19 era, this may be a risk factor for virus spread, and the use of facial masks for all in-office ophthalmological procedures has been recommended. In this case-series, we report about some errors in intraocular pressure measurement, that may occur during the slit-lamp examination of patients wearing filtering facepiece masks and N95 respirators. This is mainly due to the greater dimensions of these masks in comparison with the surgical standard ones, and to the presence of a preshaped rigid nose area that may press against the Goldmann tonometer. Special care should be taken when measuring intraocular pressure in these cases. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.