Abstract
Purpose: :
To compare central corneal thickness measurements obtained with optical coherence tomography (OCT), and ultrasound pachymetry
Methods: :
This retrospective study included 67 consecutive patients (134 eyes). Central corneal thickness measurements were obtained using ultrasound pachymetry (DGH) and Rtvue OCT (Fourier domain/ high resolution OCT). Data were analyzed using paired sample t test, Bland and Altman plot, and linear regression.
Results: :
Average central corneal thickness was 551.35+/-43.82 microm for ultrasound pachymetry, 540.84+/-45.01 microm for Rtvue OCT. Compared to the ultrasound measurement, Rtvue OCT measurements significantly underestimated the corneal thickness by 12.81+/-16.34 microm (P<.01)
Conclusions: :
Rtvue OCT underestimated central corneal thickness compared to ultrasound pachymetry
Keywords: cornea: basic science • anterior segment • comparative anatomy