From: Da Vinci Xi Robot–Assisted Penetrating Keratoplasty Trans. Vis. Sci. Tech.. 2017;6(3):21. doi:10.1167/tvst.6.3.21 Figure Legend: Trephination. The trephination is performed using an 8-mm Hessburg-Barron vacuum trephine (white arrow) held by one Black Diamond micro forceps (red arrow) and moved by the tip of a second one (green arrow) (A). This step is completed using a 30-degree blade (blue arrow) held by one robotic arm (B). Date of download: 12/27/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.