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OBJECTIVE: To study Draeger's self-tonometer handling and accuracy. MATERIAL AND METHODS: This microprocessor-controlled applanation tonometer enables the patient to perform frequent measurements himself. Two studies were carried out. In a first patient series of 22 participants, the authors analyzed patient acceptance with regard to tonometer handling, in a second group of ten normal eyes, 30 average readings obtained using the Draeger tonometer were compared to the results of Goldmann applanation tonometry. RESULTS: In the first group of 22 patients, eight participants considered that the new tonometer was easy to handle, seven reported moderately difficult and six difficult handling. One patient did not succeed in measuring at all. The results of the second group showed a statistically non-significant mean difference of 0.3 mmHg with a standard deviation of nearly 2 mmHg; 80.1% of measurements were within ±2 mmHg; the correlation coefficient was 0.73. CONCLUSIONS: Handling the self-tonometer is quite simple and provides close and reliable readings. Thus, in addition to early detection, self-tonometry offers the possibility of the improved management and follow-up of glaucoma. LA: French
Dr R. Theisen, Augenklinik und Poliklinik, Universität des Saarlandes, Kirrberger Strasse 1, D-66421 Homburg (Saar), Germany
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)