Measurement of Central Corneal Thickness in Type 2 Diabetic Patients and its Correlation with Duration, HbA1c Levels, and Severity of Retinopathy

The objective of the study is to assess the central corneal thickness (CCT) among type 2 diabetes mellitus patients and to correlate the central corneal thickness with duration of diabetes, HbA1c and severity of diabetic retinopathy. Methods: A hospital based descriptive study was conducted in Govt Medical College Kannur, Pariyaram, from April 2017 to March 2018.CCT of known diabetic patients was correlated with duration of diabetes, HbA1c and severity of retinopathy. Results: The mean central corneal thickness in diabetic patient was 550.1± 35.0µm with a range between 364 and 665 µm. Correlation of duration of diabetes and severity of diabetic retinopathy were not statistically significant. The CCT was thicker in patients with HbA1c more than 7% than HbA1c less than7% (p=0.005) which was statistically significant. Conclusion: We found that higher HBA1c level may be a marker for predicting the increase in CCT in patients with type II diabetes.