Comparison of central corneal thickness in dogs measured by ultrasound pachymetry and ultrasound biomicroscopy.Ultrasound pachymetry (UP) is currently the most common technique used to evaluate central corneal thickness (CCT).  UBM showed both a fixed and proportional bias when compared to ultrasound pachymetry, but this was not considered to be clinically important. 
ultrasound pachymetry
Comparison of central corneal thickness in dogs measured by ultrasound pachymetry and ultrasound biomicroscopy.Ultrasound pachymetry (UP) is currently the most common technique used to evaluate central corneal thickness (CCT).  The aim of this study was to compare CCT measurements obtained by UP and ultrasound biomicroscopy (UBM) in 28 eyes of 14 healthy Beagles dogs. 
ultrasound biomicroscopy