Laurence Quérat1, Enping Chen1. 1. Department of Clinical Neurosciences, Department of Anterior Segment Disorders, Glaucoma, Neuro-Ophthalmology and Oculoplastics (Clinic 1), St. Erik Eye Hospital, Karolinska Institutet, Stockholm, Sweden.
Abstract
PURPOSE: To evaluate the accuracy of the intraocular pressure (IOP) measured by healthy subjects with icare® Home and to observe the IOP fluctuation and pattern of IOP fluctuation in healthy subjects over three consecutive days. METHODS: Sixty healthy subjects were recruited to the study. IOP was measured by the subjects themselves and by study staff using icare® Home tonometers on visits 1 and 2, as well as by study staff using Goldmann applanation tonometry (GAT). Furthermore, the subjects measured their IOP at home for three consecutive days. RESULTS: Twenty-three per cent of the study eyes were excluded in the statistical analysis due to dropout or non-compliance to the schedule. Approximately 70% of the icare® Home measurements were within 3 mmHg of the GAT measurements. Ten to 16% of the study eyes had IOP peaks outside office hours. Sixty-three per cent of the study eyes had different IOP patterns on consecutive days. CONCLUSION: Rebound self-tonometry appears to be accurate and could be used to monitor short- and long-term IOP variations. The difference between IOP patterns on consecutive days raises questions as to the certainty of a single IOP measurement as a measure of treatment effect.
PURPOSE: To evaluate the accuracy of the intraocular pressure (IOP) measured by healthy subjects with icare® Home and to observe the IOP fluctuation and pattern of IOP fluctuation in healthy subjects over three consecutive days. METHODS: Sixty healthy subjects were recruited to the study. IOP was measured by the subjects themselves and by study staff using icare® Home tonometers on visits 1 and 2, as well as by study staff using Goldmann applanation tonometry (GAT). Furthermore, the subjects measured their IOP at home for three consecutive days. RESULTS: Twenty-three per cent of the study eyes were excluded in the statistical analysis due to dropout or non-compliance to the schedule. Approximately 70% of the icare® Home measurements were within 3 mmHg of the GAT measurements. Ten to 16% of the study eyes had IOP peaks outside office hours. Sixty-three per cent of the study eyes had different IOP patterns on consecutive days. CONCLUSION: Rebound self-tonometry appears to be accurate and could be used to monitor short- and long-term IOP variations. The difference between IOP patterns on consecutive days raises questions as to the certainty of a single IOP measurement as a measure of treatment effect.
Authors: Jessie Huang; Paula Katalinic; Michael Kalloniatis; Michael P Hennessy; Barbara Zangerl Journal: Optom Vis Sci Date: 2018-02 Impact factor: 1.973