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Abstract #15174 Published in IGR 8-4
Intraocular pressure measurements with the ProviewTM Self-Tonometer in comparison of Goldmann applanation tonometry in healthy and glaucomatous eyes
Meyer MW; Yevelenko V; Hoy L; Meyer A; Erb CKlinische Monatsblätter für Augenheilkunde 2006; 223: 899-903
BACKGROUND: The aim of this study was to compare the results of intraocular pressure (IOP) measurements obtained using the pressure phosphene tonometer Proviewtrade mark with those from Goldmann applanation tonometer (GAT) in normal and glaucomatous eyes. PATIENTS AND METHODS: The IOP in 150 eyes of 62 healthy volunteers and 88 patients with glaucoma or ocular hypertension was measured prospectively in a sitting position. After being trained to use the Proviewtrade mark device, Goldmann applanation tonometry was performed first. Then the patient took a reading with the Proviewtrade mark self-tonometer. RESULTS: For all investigated eyes the measurements with the Proviewtrade mark were on average 5.5 mmHg higher than those by GAT. Only 34 % of the readings from the two devices were within a difference range of ± 3 mmHg. On comparing the group of glaucomatous patients with slight visual field defects with the group of healthy subjects and patients with ocular hypertension without visual field defects we determined almost the same mean difference between the Proviewtrade mark and GAT (mean difference in the group with visual field defects = 4.7 ± 4.1 mmHg; without defects = 4.8 ± 2.9 mmHg). CONCLUSIONS: The tonometer Proviewtrade mark did not show a close agreement to GAT. Therefore, the PPT does not offer an alternative method for measuring IOP. We do not recommend the Proviewtrade mark for self-tonometry at home or for clinical management of patients with glaucoma. Slight visual field defects seem to have no influence on intraocular pressure measurement with the self-tonometer. LA: German
Dr. M.W. Meyer, Augenklinik der Medizinischen Hochschule Hannover, Germany
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
2.2 Cornea (Part of: 2 Anatomical structures in glaucoma)
