Effect of Central Corneal Thickness on Intra Ocular Pressure Measured by NCT and GAT

Dr. Nithisha T. M, Dr. Kaushal Bhat, Dr. Mayuri Kathariya

Abstract: Purpose: To assess the effect of central corneal thickness (CCT) on intra ocular pressure measured by non-contact tonometer and goldmann applanation tonometer. Method: A hospital based observational study done on 60 eyes of 30 patients aged 18-40 years, without comorbidities and without history of ocular trauma. CCT was measured first using Tomey Specular microscope EM-4000, NCT (non-contact tonometer) using air puff Frey TN-100, followed by GAT (goldmann applanation tonometer). Results: Pearson Correlation:0.59 (p-value < 0.001), indicates a moderate positive correlation, confirming that higher CCT is associated with higher GAT readings. Linear Regression: Slope of 0.12 and R-squared of 0.35, suggests that about 35% of the variability in GAT readings is explained by CCT. Pearson Correlation: 0.84 (p-value < 0.001), indicating a strong positive correlation indicating a strong association between higher CCT and higher NCT readings. Linear Regression: Slope of 0.24 and R-squared of 0.71, shows that 71% of the variability in NCT readings can be explained by CCT. CCT significantly impacts both GAT and NCT readings, with NCT readings being more strongly affected by changes in CCT.

Keywords: CCT (Central corneal thickness), NCT (Non-Contact Tonometer), GAT (Goldmann Applanation Tonometer), IOP (Intra Ocular Pressure)

How to Cite?: Dr. Nithisha T. M, Dr. Kaushal Bhat, Dr. Mayuri Kathariya, "Effect of Central Corneal Thickness on Intra Ocular Pressure Measured by NCT and GAT", Volume 13 Issue 12, December 2024, International Journal of Science and Research (IJSR), Pages: 1257-1261, https://www.ijsr.net/getabstract.php?paperid=SR241218165256, DOI: https://dx.doi.org/10.21275/SR241218165256