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Purpose: This study aimed to elucidate the frequency of surgery-induced iris abnormalities after Descemet membrane endothelial keratoplasty (DMEK) and their impact on postoperative clinical outcomes. Methods: In this retrospective study, medical records of 32 eyes from 28 consecutive patients (mean age, 65.7±13.4 years; 14 men, 18 women) who underwent DMEK (or triple DMEK) were reviewed. In all patients, inferior peripheral iridectomy was created leaving full intracameral air tamponade at the end of surgery. Sulfur hexafluoride gas was not used in any cases. Surgery-induced iris abnormalities such as pupillary shape changes and iris depigmentation were evaluated by 3 masked observers. Pre-existing abnormalities were excluded. Eyes were divided into two groups based on the presence of surgery-induced iris changes: Group A (with iris abnormalities) and Group B (without). Impacts on postoperative clinical outcomes such as vision and endothelial cell density were analyzed. Results: Surgery-induced iris abnormalities were seen in 15 eyes (Group A, 9 with pupillary shape change and 6 with iris depigmentation; 46.9%), and 17 eyes showed no abnormalities (Group B, 53.1%). No significant differences were detected between groups in age, sex, indication, simultaneous cataract surgery, pre- and 6-month postoperative vision, donor age, donor endothelial cell density, and 6- and 12-month postoperative endothelial cell density. Conclusions: Surgery-induced iris abnormalities were noted in almost half of the eyes after DMEK (46.9%) in this study. However, there was no association between visual outcomes or postoperative endothelial cell density and the iris changes.

clinical ophthalmology

&lt;p&gt;Surgery-induced iris abnormalities after Descemet membrane endothelial keratoplasty and their impact on postoperative clinical outcomes&lt;/p&gt;