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Introduction and Importance: To report the 21st case showing the rare occurrence of retained Descemet's membrane (DM) following penetrating keratoplasty (PKP). We intend to investigate possible etiologies, expected sequelae, and outcome of neodymium-dpoed yttrium alumnium garnet (Nd: YAG) laser membranectomy., Case Presentation: Our case is a 74-year-old male who underwent PKP surgery in the right eye secondary to corneal decompensation following cataract surgery in addition to corneal thinning secondary to superficial keratectomy related to the pre-existing climatic droplet keratopathy (CDK). Postoperative assessment revealed a retro-corneal membrane within the anterior chamber, which was affecting his vision., Clinical Discussion: Based on the post-operative course and the decreased vision as an indication for intervention, it was decided to excise the retained DM. Membranectomy with Nd: YAG laser was performed, and the patient's visual acuity measurement improved from 20/400 to 20/25. However, the endothelial cell count decreased from 1479 to 520 cells/mm 2 (35 % loss) at 15 months post YAG membranectomy with clear graft. Histopathological examination confirmed the clinical suspicion of a retained DM, since it was absent in the submitted host corneal tissue in addition to the pre-existing CDK., Conclusion: Retention of DM following PKP is a rare but possible complication and high index of suspicion is required for proper diagnosis and management to obtain better visual outcome. Nd: YAG laser membranectomy was effective in excising the retained DM and improving vision. Endothelial cell loss following Nd: YAG laser membranectomy as a complication was observed and should be addressed during the treatment plan., Competing Interests: Declaration of competing interest None., (Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Introduction and Importance: Intraocular lens (IOL) implantation after cataract surgery is routine procedure. Traumatic dislocation of the posterior chamber IOL into the subconjunctival space following blunt ocular trauma is rare and it is considered an ophthalmic emergency., Case Presentation: We present a case of a 71-year-old male that presented to our institution with traumatic dislocation of a posterior chamber IOL into the superior-nasal subconjunctival space following blunt trauma to his left eye after an accidental fall on his head., Discussion: Trauma in a pseduphakic eye can be devastating. Early recognition and treatment of IOL dislocation are of paramount importance to prevent further damage and infections. Half ring sign (Psudophacocele) recognition help in identifying and localizing the dislocated IOL in subconjunctival space., Conclusion: Traumatic dislocation of posterior chamber IOLs have been rarely reported in the literature. Nevertheless, it could happen years after implantation., Competing Interests: Conflict of Interest None., (Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.)