Fig. 5From: Investigation of predictability and influence factors of the achieved lenticule thickness in small incision lenticule extractionBland–Altman charts displaying the difference between Scheimpflug Imaging and Ultrasound. In virgin and post-SMILE refractive surgery corneas, Bland–Altman charts displaying the difference for central corneal thickness measurements. The pupil center and corneal vertex were selected as the 2 locations for measurement calculation on Pentacam. A negative difference indicates a thinner reading on Pentacam compared to ultrasound. Bias ±95% limits of agreement are displayed (Table 3). (CCT: central corneal thickness)Back to article page