Slit-lamp examination of this patient revealed that on adducting his left eye, the ulcerated corneal margin comes into direct contact with the cap of the lower lid PP.

• 后在一次裂隙灯检查中发现左眼内转时，角膜溃疡边界和略突出的硅胶栓帽边相接，边缘形状和帽边吻合。拔除栓子碎片和整体后一周溃疡愈合。