Ángel García-VásquezSergio RojasGeovanni Ríos-NequisAbel Ramírez-Estudillo2026-03-222026-03-22202410.21203/rs.3.rs-4299546/v1https://doi.org/10.21203/rs.3.rs-4299546/v1https://andeanlibrary.org/handle/123456789/84343<title>Abstract</title> <bold>Objetives</bold>: This study was performed to evaluate the safety and effectiveness of a lyophilized amniotic membrane (LAM) as a patch for the treatment of retinal breaks and to describe the structural changes at the implantation site. <bold>Design</bold>: prospective, interventional study. <bold>Subjects</bold>: Patients with diabetic retinopathy and combined tractional and rhegmatogenous retinal detachment. <bold>Methods</bold>: Patients were organized into 3 groups according to the number of rhegmatogenous lesions: those in group A had a single break, those in group B had two breaks, and those in group C had three or more breaks. The location of the break was also evaluated as either superior or inferior. <bold>Main outcomes:</bold> Safety was evaluated and defined as a lack of adverse events or the absence of damage to the retinal tissue and intraocular structures. Efficacy was determined by evaluating SD-OCT images to assess whether complete coverage of the retinal break favouring the proximity of the edges and closure of the retinal break was achieved. <bold>Results</bold>: Of a total of 23 eyes of 23 patients, 22 (95.6%) achieved retinal repair without associated complications. Patients with 2 or fewer rhegmatogenous lesions located inthe superior sector had a better anatomical result as they achieved 100% surgical success. The structural changes observed by SD-OCT showed adequate adaptation of the lyophilized patch and complete closure of the rhegmatogenous lesion with no alterations in the adjacent tissue. <bold>Conclusions</bold>: The LAM patch seems to be safe and effective, as it promotes therapeutic closure of rhegmatogenous lesions without damaging the retinal architecture adjacent to the implantation site.enMedicineRetinal detachmentOphthalmologySurgeryRetinalpreprint