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¹Cumhuriyet Üniversitesi Tıp Fakültesi Göz Hastalıkları AD., Sivas, Yard. Doç.Dr.
²Cumhuriyet Üniversitesi Tıp Fakültesi Göz Hastalıkları AD., Sivas, Uz. Dr.
³Cumhuriyet Üniversitesi Tıp Fakültesi Göz Hastalıkları AD., Sivas, Doç. Dr.
⁴Cumhuriyet Üniversitesi Tıp Fakültesi Göz Hastalıkları AD., Sivas, Prof. Dr. Purpose: To compare the intraocular pressure values of Diaton transpalpebral tonometer (DTT) with those of the Goldmann applanation tonometer (GAT) and Canon TX-F noncontact tonometer.
Materials and Methods: 103 eyes of 52 normal individuals not applied any intraocular or upper eyelid surgery and not diagnosed as glaucoma or did not use any glaucoma drugs, were included the study. After first observer made the measurement with Canon TX-F, second and third observers performed DTT and GAT, respectively with 15 minutes interval. Central corneal thickness of the each participant was measured by ultrasound pachymetry (Heidelberg Engineering IOPac, Canada). The corrected GAT values (D-GAT) were calculated according to the corneal thickness. The D-GAT and the other two devices values were compared with ANOVA and Pearson correlation analysis, the dual comparisons were made with t test.
Results: Canon TX-F values were 1.02±3.40 mmHg higher than D-GAT values, and DTT values were 0.83±3.53 and 1.85±3.69 mmHg lower than D-GAT and Canon TX-F values, respectively. Canon TX-F values shown excellent correlation with D-GAT values (r=0.549, p<0.001), and there were moderate correlations between DTT and D-GAT values (r=0.430; P<0.001), and between DTT and Canon TX-F values (r=0.455; P<0.001).
Conclusions: DTT can be useful especially for IOP measurement in the corneal pathologies, but it could make lower measurements than GAT must not be forgotten. Although Canon TX-F is seen as a safe device for normotansive cases, it made higher measurements than GAT must be kept in mind. Keywords : Diaton transpalpebral tonometer, Goldmann applanation tonometer, Canon TX-F non-contact tonometer