Materials and Methods: Two hundred eighteen eyes of 109 patients were included in the study. Intraocular pressure measurements were obtained by the CT-1P and GAT, whereas CCT measurements were obtained by CT-1P and Pentacam. Blant-Altman plots for agreement, and Pearson correlation and interclass correlation (ICC) for reliability between the measurements were analyzed.

Results: The mean IOP^CT-1P, IOP^{CT-1P adj.}, IOP^GAT were measured as 18.2±4.32 mmHg, 17.75±4.05 mmHg and 16.9±4.16 mmHg, respectively. The mean CCT was measured as 554.8±37.3 ?m and 543.6±35.9 ?m with CT-1P and Pentacam, respectively. Mean differences between devices were signifi cantly different in terms of IOP and CCT measurement (p<0.001, for all). Interclass correlation coeffi cient confi rmed the excellent reliability between devices in terms of measurement of IOP and CCT (p<0.001, for all). The 95% limits of agreement (LoA) for IOP were -4.24 to 3.28 mmHg between IOP^{CT-1P adj.} and IOPCT-1P, -3.49 to 5.14 mmHg between IOP^{CT-1P adj.} and IOP^GAT and -2.7 to 5.3 mmHg between IOPCT-1P and IOPGAT. Also 95% LoA for CCT were -12.33 to 32.16 ?m between CCT^CT-1P and C^CTPentacam.

Conclusion: Although CT-1P overestimated both IOP and CCT measurements, the device had an excellent ICC with Pentacam and GAT in terms of CCT and IOP measurements. The ability of tono-pachymeters measuring both CCT and IOP with a single device provide an important convenience in busy clinics. Keywords : Central corneal thickness, Intraocular pressure, Non-contact tono-pachymeter