Objective: To evaluate effect of microsurgery of lamellar keratoplasty (LKP) on Mooren’s corneal ulcer.Methods: The effect, postoperative astigmatism, postoperative vision, ulcer recurrence of postoperation, and surgical complications of two groups of consecutive Mooren’s ulcer inpatients treated respectively by non-microsurgery of LKP and microsurgery of LKP were analyzed.Results: There were significant differences of the effect, postoperative astigmatism, postoperative vision, ulcer recurrence of postoperation, and surgical complications between the two groups. The effect and postoperative vision of the microsurgery-treated group were betterthan those of the non-microsurgery-treated group. The postoperative astigmatism, ulcer recurrence of postoperation, and surgical complications of the microsurgery-treated group were less than those of the nonrnicrosurgery-treated group. Conclusion: Microsurgery of LKP of Mooren’s corneal ulcer can greatly improve the ulcer healing and postoperative vision, and redu Objective: To evaluate the effect of microsurgery of lamellar keratoplasty (LKP) on Mooren’s corneal ulcer. Methods: The effect, postoperative astigmatism, postoperative vision, ulcer recurrence of postoperation, and surgical complications of two groups of consecutive Mooren’s ulcer inpatients treated respectively by non- microsurgery of LKP and microsurgery of LKP were analyzed. Results: There were significant differences of the effect, postoperative astigmatism, postoperative vision, ulcer recurrence of postoperation, and surgical complications between the two groups. The effect and postoperative vision of the microsurgery-treated group were betterthan those of the non-microsurgery-treated group. The postoperative astigmatism, ulcer recurrence of postoperation, and surgical complications of the microsurgery-treated group were less than those of the nonrnrosergery-treated group. Conclusion: Microsurgery of LKP of Mooren’s corneal ulcer can greatly improve the ulcer healing and postoperativ e vision, and redu