Fig. 3. When the eye is rotated far inferiorly to perform vitrectomy of the vitreous base, the outer portion of the infusion cannula can be forced against the lower eyelid (small arrow). The peripheral retina is damaged when the inner sharp tip comes in contact with it (large arrow). To avoid this complication, the infusion cannula is placed closer to the horizontal meridian (i.e., along the inferior margin of the lateral rectus muscle). (Freeman HM, Tolentino FI: Basic vitrectomy: Prevention and management of complications. In: Atlas of Vitreoretinal Surgery, pp 65–74. Stuttgart, Thieme, 1990)