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[Self-measurement of intraocular pressure]
R Theisen1, V Scherer, K W Ruprecht
1Augenklinik und Poliklinik, Universität des Saarlandes, Kirrberger Str. 1, D-66421 Homburg.
Objective:
To study Draeger's self-tonometer handling and accuracy.
Materials And Methods:
This microprocessor-controled applanation tonometer enables the patient to perform frequent measurements himself. Two studies were carried out. In a first patient series of 22 participants we analyzed patient-acceptance with regard to tonometer handling, in a second group of 10 normal eyes, 30 average readings obtained using the Draeger tonometer were compared to the results from Goldmann applanation tonometry.
Results:
In the first group of 22 patients, 8 participants considered that the new tonometer was easy to handle, 7 reported moderately difficult and 6 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 0.3mmHg with a standard deviation of nearly 2 mmHg. 80.1% of measurements were within +/-2mmHg. The correlation coefficent 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 improved management and follow-up of glaucoma.