Fig. 4

Patient 3 (noninfectious, visual acuity: LP, right eye). a Green dotted circle indicates the perforation (1.5 × 1.5 mm in diameter) with a small area of iris prolapse; yellow dotted circle indicates a large circular area of corneal ulcer and leucoma. b A small, thin PK graft was sutured to close the perforation, then a LK graft—larger than the ulcerated region—was sutured across the optical axis for a better visual acuity after surgery. c 9 months after surgery, the graft showed improved transparency