Measurements of Intraocular Pressure Using TGDc-01 and Applanation Tonometry
Lösch A.1, Scheuerle A. F.1, Mackensen F.1, Pfirmann M.1, Bauer A.1, Martin M.2, Becker M.1
1Interdisciplinary Uveitis Center Heidelberg; 2Department of Ophthalmology, Basel
Purpose: Corneal has introduced the new tonometer TGDc-01 a few months ago. The new tonometer`s sensor determines the intraocular pressure (IOP) analyzing a rebound phenomenon and was designed for easy handling and screening purposes.
Method: We measured the IOP of a total of 50 eyes (25 patients) with regular corneal surfaces, treated for intraocular inflammation in the interdisciplinary uveitis center, using both the TGDc-01 and applanation tonometry. Two indipendent examiners consecutively performed single blinded IOP measurements. While from three transpalpebral measurements with the TGDc-01 a mean value was calculated, only one applanation measurement was performed per eye.
Results: Values of IOP measurements acquired with the TGDc-01 were lower than those of applantion tonometry (mean - 3,6 mmHg, standard deviation ± 4,8 mmHg). A maximum deviation of 8 mmHg below and 14 mmHg above the values of applanation tonometry were observed in two cases.
Conclusions: In most cases using the TGDc-01 resulted in lower IOP measurements than did applanation tonometry. Taking into account this observation the small and easy to handle intrument could become a valuable screening tool. However, further investigations ar
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