Comparison of Central Corneal Thickness Measurements Using Contact and Non-contact Pachymetry Devices in Glaucoma Patients

Objective: To explore the relationship between contact and non-contact pachymetry methods in measuring central cornealthickness among patients diagnosed with primary open-angle glaucoma.Methodology: After ethical approval, written permission was obtained from all eligible participants after providing full detailsabout the procedure, risks, and benefits of the study for this cross-sectional study. Central corneal thickness wascalculated by contact method using Nidek Al scan biometer ultrasound measurement & by non- contact methods usingNidek Al scan biometer optical measurement, TOMEY TMS 5 slit corneal topographer, and REXXAN SPM-700 specularmicroscope. All collected data was digitized for use in the research analysis.Results: The mean ± standard deviation of age was 57.90±12.19 years. In the distribution of gender, 44.0% were maleand 56.0% were female. A statistically significant correlation was observed between contact and non-contact pachymetrymeasurements of central corneal thickness, with Pearson’s correlation coefficient calculated at r = 0.773 (P < 0.05).Conclusion: A positive significant linear correlation was noted between contact and non-contact pachymetry devices inthe measurement of central corneal thickness.Key words: Contact Pachymetry, Corneal Thickness, Open Angle Glaucoma, non-contact Pachymetr