Programm                 "Degeneration und Regeneration– Grundlagen, Diagnostik und Therapie"

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Evaluation of the New Mobile TGDc-01 Tonometer and Comparison with the Goldmann Applanation Tonometry

Rombold F., Thiel M., Neubauer A. S., Hirneiß C., Kampik A.
Department of Ophthalmology, Ludwig-Maximilians University, Munich

Purpose: We tested patients acceptance and intraocular pressure (IOP) readings of a new digital mobile Tonometer (TGDc-01) and compared these values with Goldmann applanation tonometry. The TGDc-01 measures IOP through the eylid, avoids direct corneal contact, is used without local anaesthetics, is independent from corneal diseases and does not require a slit lamp.
Method: Five measurements with the TGDc-01 and one with Goldmann tonometry in a total of 100 eyes of 100 patients were done by two independent investigators. The influence of pachymetry and lid structure were examined and patients acceptance of both techniques was evaluated by visual analogue scale (VAS).
Results: The mean IOP with the TGDc-01 was 15,40 mmHg for investigator 1 and 12,72 mmHg for investigator 2 [4-43 mmHg]. Results of the measurements with Goldmann tonometry showed 17,62 mmHg for investigator 1 and 17,31 mmHg for investigator 2 [9-42 mmHg]. The IOP difference of both methods was highly significant (p<0,001). The intraobserver variability of the TGDc-01 was 29% for investigator 1 and 8% for investigator 2. The mean IOP values of the two investigators with the TGDc-01 differed significantly (p<0,01). The visual analogue scale scores of all patients (100 = maximal comfort, 0 = not acceptable) was 74,8±14,8 for the TGDc-01 compared with 63,0 mm±18,6 for the gol

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