San Francisco-In eyes with normal endothelium requiring corneal transplantation, deep anterior lamellar keratoplasty (DALK) using Anwar's big-bubble technique can result in visual acuity outcomes that are at least as good as those experienced after penetrating keratoplasty (PKP) and with the advantage of causing fewer complications than the full thickness procedure, said Donald H. Tan, MD, deputy director and head, corneal service, Singapore National Eye Centre, and head and professor of ophthalmology, National University of Singapore.