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We read with interest the article by Moodie et al1 in which they assessed the value of 24-hour intraocular pressure (IOP) monitoring in patients with treated glaucoma. This is a very important issue, and the authors are to be applauded for attempting to address it. They conclude that 24-hour IOP monitoring offers little advantage over daytime monitoring. In our opinion, however, the study has methodological issues that might have influenced the outcome.
The objective of this study was to determine the value of daytime and 24-hour monitoring for detection of IOP fluctuations and peaks in patients with treated glaucoma. All IOP measurements were in the sitting position. Ideally, such an investigation should be carried out with measurements …