Canan H, et al. - In this prospectively designed controlled clinical trial, researchers compared central corneal thickness (CCT) values measured by three different devices: slit-scanning topography (SST), ultrasonic pachymetry (UP), and optical coherence tomography (OCT) in diabetic eyes and contrasted the CCT values in individuals with and without diabetic retinopathy. The sample consisted of 96 consecutive Caucasian patients with the diagnosis of DM. The authors discovered that neither the duration of DM nor the presence of diabetic retinopathy did have a major impact on the CCT. The CCT values obtained were all in correlation with the three devices. SST's results were, however, significantly higher than the other two. The outcomes highlight the value anterior segment OCT in CCT measurements, considering that it is a non-contact method and it does correlate very well with UP.