2Prof. Dr. Yüzüncü Yıl Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Van - TÜRKİYE
3Yrd. Doç. Dr. Hitit Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Çorum- TÜRKİYE
4Prof. Dr. Hitit Üniversitesi Tıp Fakültesi, Göz Hastalıkları Anabilim Dalı, Çorum- TÜRKİYE Purpose: To compare the results of intraocular pressure (IOP) measurement of three different tonometers, Goldmann Applanation Tonometry (GAT), Pascal Dynamic Countour Tonometry (DCT) and Keeler Pulsair EasyEye Non-Contact Tonometry (NCT) in keratoconus.
Materials and methods: Sixty-two eyes of 36 keratoconus subjects were included in the study. After resting for 5 minutes, patient’s IOP was measured. For all subjects, IOP measurements were taken sequentially on the same day by one experienced operator. Three sets of IOP measurements were obtained from each tonometer. Five minutes interval was given between each device.
Results: Mean IOPs were 14.36±2.50, 13.92±2.08 and 9.70±2.81 mmHg for GAT, DCT and NCT, respectively. It was impossible to measure IOP in 4 eyes (6.45%) for DCT and in 7 eyes (11.29%) for NCT. The accordance rate was 11.30% between GAT and NCT, and was 51.29% between GAT and DCT.
Conclusions: NCT is not reliable for measuring intraocular pressure in keratoconus. We found the accordance between GAT and DCT.
Keywords : Keratoconus, intraocular pressure, Goldmann applanation tonometry, digital countour tonometry, non-contact tonometry