Excimer versus Femtosecond Laser Assisted Penetrating Keratoplasty in Keratoconus and Fuchs Dystrophy: Intraoperative Pitfalls

Figure 8

Positive pressure from vitreous (vis a tergo), depicted in three grades: 0 means no intraoperative pressure, 1 means iris prolapse till the level of the corneal incision, and 2 means iris prolapse beyond the level of the corneal incision.