2Uz. Dr., Ahi Evran Üniversitesi Tıp Fakültesi, Göz ABD, Kırşehir, Türkiye Purpose: We aimed to compare central corneal thickness (CCT) measurements in eyes with primary open-angle glaucoma (POAG) with optical biometry ( Haag-Streit Lenstar LS 900 Optical Biometer,Switzerland) and ultrasonic pachymetry (USP) devices.
Materials and Methods: We included 35 eyes of 35 patients with POAG in this prospective observational study. CCT was measured with the optic biometric pachymetry and an USP device (Pac-Scan 300p, Sonomed Escalon, NY, USA). While the first observer conducted the measurement with both the optic biometric pachymetry and USP devices, the second observer only used the optic biometric pachymetry device. Spearman correlation analysis was used in the correlation analysis.
Results: Central corneal thickness with the optic biometric pachymetry was 526.6±39.6 μm for the first observer and 527.7±40.6 μm for the second observer. The central corneal thickness was 541.9±43.6 μm with USP. Statistically signifi cant lower measurements were found with the optic biometric pachymetry device than with USP (p<0.001). A statistically signifi cant and strong correlation was present between the observers\' measurements of the central cornea thickness with the optic biometric pachymetry (r=0.995, p<0.001). A statistically signifi cant and strong correlation was also present between the central corneal thickness measurements of the first observer using the two devices (r=0.943, p<0.001).
Conclusion: Optic biometric pachymetry provides lower central corneal thickness measurements than USP in primary open-angle glaucoma. Although there is a strong correlation between the two devices, this difference may be important in intraocular pressure measurements.
Keywords : Optic biometric pachymetry, ultrasonic pachymetry, central corneal thickness, primary open angle glaucoma, intraocular pressure