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Abstract #11705 Published in IGR 7-1
Reproducibility of self-measured intraocular pressure with the phosphene tonometer in patients with ocular hypertension and early to advanced glaucoma
Brigatti L; Maguluri SJournal of Glaucoma 2005; 14: 36-39
See also comment(s) by Michael Diestelhorst •
PURPOSE: To evaluate the reproducibility of self-measured intraocular pressure with the Proview tonometer in ocular hypertensives and early to advanced glaucoma patients. PATIENTS AND METHODS: Thirty-three patients with glaucoma and three with ocular hypertension (72 eyes) were prospectively enrolled. History of cornea surgery was the only exclusion criterion. A trainer took a set of three readings first. Subsequently, the patient (after successful training) took one set of three readings and a physician took two sets of three Goldmann readings. One hour later this was repeated. RESULTS: 72% of patients could see the phosphene in both eyes, 8% could see it in one eye, and 19% could not see it in either eye. Patients who could not see the Phosphene had an average mean deviation of -10.9 compared with -3.4 for those who could see it (P = 0.01). Eyes that could not see the phosphene were excluded from further analysis. The average absolute difference between two Proview measurements one hour apart was 1.76 ± 1.76 mmHg (r = 0.71). The measurement error (difference between Goldmann and Proview readings) tended to remain constant between sets of measurements taken one hour apart (average error was 2.4 ± 2.1 mmHg, r = 0.85). No adverse event was recorded. CONCLUSIONS: Repeated self-tonometry measurements showed very good reproducibility. The systematic, reproducible error between Proview and Goldmann readings may be clinically acceptable and suggests that a baseline 'calibration' should be obtained for each patient before the Proview values are used clinically. Self-administered tonometry can play a role in the clinical care of ocular hypertensive and glaucoma patients with the possible exception of very advanced cases.
Dr. L. Brigatti, Department of Ophthalmology, University of Rochester, School of Medicine and Dentistry, Rochester, NY, USA. lbrigatti@eyes.arizona.edu
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
