Fig. 2From: Influence of pterygium size on corneal higher-order aberration evaluated using anterior-segment optical coherence tomographyPterygium size and change in Zernike aberrations. In eyes with small pterygium, Zernike aberration of the corneal surface (point A). As the pterygium end is close to or within the area of Zernike analysis (points B and C, respectively), surface irregularity induced by the advancement could increase Zernike aberrationsBack to article page