Nd:YAG Laser Iridotomy Versus Surgical Iridectomy in Descemet Membrane Endothelial Keratoplasty: Comparison of Postoperative Outcome and Incidence of Ocular Hypertension.

Purpose: To evaluate outcome and incidence of ocular hypertension after Descemet membrane endothelial keratoplasty (DMEK) and DMEK combined with cataract surgery (triple DMEK) after Nd:YAG laser iridotomy (IO) and surgical iridectomy (IE).

Methods: This is a single-center, retrospective cohort study of patients who underwent DMEK or triple DMEK surgery at the Department of Ophthalmology, University Hospital Düsseldorf, Germany, from January 2018 to June 2020 and had received either a prophylactic preoperative IO or an intraoperative IE. Patient demographic data; best corrected visual acuity; central corneal thickness; intraocular pressure (IOP); endothelial cell density; and complications such as occurrence of early postoperative IOP elevation, macular edema, rebubbling rate, and incidence of glaucoma were analyzed.

Hyperbaric Oxygenation Maintains Elevated Stromal Oxygen Availability During Corneal Collagen Crosslinking with and Without Epithelial Removal.

Purpose: Corneal collagen cross-linking (CXL) can halt corneal ectasia. Leaving corneal epithelium intact during treatment may reduce the incidence of complications. However, it is under debate whether this reduces efficacy and if oxygen supplementation may be necessary to optimize the cross-linking effect.

Descemet Membrane Endothelial Keratoplasty With and Without Graft Deswelling: A Prospective Clinical Study.

Purpose: The purpose of this study was to assess whether omission of dextran from corneal organ culture medium alters the outcome of Descemet membrane endothelial keratoplasty.

Methods: Participation in this single-center, multisurgeon, prospective, randomized, comparative clinical trial was offered to patients scheduled for Descemet membrane endothelial keratoplasty between April 2020 and May 2022. Patients received grafts from corneas deswollen in organ culture medium-containing 6% dextran T-500 or from corneas that were not deswollen.

Indications and outcomes of keratoplasty ≤ 5.5 mm diameter ("mini-keratoplasty").

Purpose: To report indications and clinical outcomes of corneal grafts ≤ 5.5 mm in diameter ("mini-KP") in a German tertiary referral center.

Methods: Patients who had undergone mini-KP to treat corneal ulcers with or without perforation between 2011 and 2018 at the Department of Ophthalmology, University of Düsseldorf, Germany, were identified from the local keratoplasty registry.

Evaluation of the Use of Intraoperative OCT in Routine Surgery: A Two-year Comparison.

Background: In recent years, an increasing number of surgical microscopes fitted with an OCT module (intraoperative OCT, iOCT) have become available, providing high-resolution images of the surgical site in real time. While a 2018 survey at our hospital showed that iOCT delivered an additional intraoperative benefit in only 2.4% of all operations, considering that the manufacturer had since revised the hardware and software, we conducted a second user evaluation of this technology.