advertisement
Abstract #11385 Published in IGR 6-3
Comparison of intraocular pressure measurements with the digital tonometer TGDc-01 'PRA' and the Goldmann applanation tonometer
Meyer MW; Gockeln R; Hoy L; Meyer A; Erb COphthalmic Research 2004; 36: 250-254
BACKGROUND: To compare intraocular pressure (IOP) measurements obtained with the digital tonometer TGDc-01 'PRA' with those from a Goldmann applanation tonometer (GAT). METHODS: The IOP in 176 eyes of 88 healthy volunteers was measured prospectively in a sitting position. One single measurement, generated by the TGDc-01 PRA, was compared with a single reading from the GAT. RESULTS: Mean IOP values were 13.0 ± 3.7 mmHg for the TGDc-01 PRA (range, 4-22 mmHg) and 14.9 ± 3.2 mmHg for the GAT (range, 8-27 mmHg). The mean difference was 1.9 mmHg with a standard deviation of 2.77 mmHg, and this was statistically significant (p < 0.001, paired t test). CONCLUSIONS: In comparison to the GAT, the TGDc-01 PRA underestimated IOP on an average of 1.9 mmHg. Only 50.6% of all measurements were within the ± 2 mmHg difference range. Thus, the TGDc-01 PRA has no high coincidence degree with the GAT. Both methods were not equivalent.
Dr. M.W. Meyer, Department of Ophthalmology, Medical School Hannover, Germany. drmichaelmeyer@web.de
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
