Journal
ACTA OPHTHALMOLOGICA
Volume 94, Issue 8, Pages 788-792Publisher
WILEY
DOI: 10.1111/aos.13129
Keywords
circadian rhythm of IOP; intraocular pressure; rebound tonometry; self-tonometry
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PurposeTo evaluate the reliability of intraocular pressure measured by patients with glaucoma themselves using a new hand-held tonometer and to observe whether the intraocular pressure (IOP) variations have the same pattern on different days while glaucoma treatment is constant. MethodsEighty-seven patients diagnosed with open-angle glaucoma or ocular hypertension were recruited to the study. Intraocular pressure measured using Goldmann applanation tonometry (GAT) was compared with IOP measured using tonometry at baseline and on the second visit. Patients measured their IOP at home using the hand-held tonometers. ResultsThe mean difference between GAT and iCare((R)) values varies from 0 to 1mmHg. Seventy-eight per cent of iCare((R)) measurements were within 3mmHg of the GAT measurements. Approximately 64% of the study eyes had higher IOP in the morning than in the afternoon/evening. Circadian patterns differed between consecutive days in 47% of the study eyes. There were IOP peaks outside office hours in up to 16% of the study eyes. ConclusionMeasurements made using rebound self-tonometry are accurate and could be used to complement the investigation of patients with glaucoma. Intraocular pressure curves provide valuable data usable when adapting glaucoma treatment.
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