Figure 1. Iris damage scoring methods.
Iris damage (white arrows) was scored based on preoperative slit-lamp microscopy and iris photograph using infrared light as follows: 0, no iris damage; 1, iris damage limited to only one quadrant: 2, iris damage in two quadrants: 3, iris damage in three quadrants: 4, iris damage in four quadrants. Intraoperative iris damage was assessed and regarded as one of independent factors.