Survival of the best? – Why some surgical techniques such as deep sclerectomy ‘fail’

Results of CO2 Laser-assisted Deep Sclerectomy as Compared With Conventional Deep Sclerectomy.

PURPOSE To evaluate the efficacy of CO2 laser-assisted sclerectomy surgery (CLASS) compared with classic nonpenetrating deep sclerectomy (NPDS) with implant in medically uncontrolled glaucoma patients. MATERIALS AND METHODS Patients who underwent primary filtration surgery with CO2 laser system at the time interval between July 2010 and April 2011 were identified, their medical files were rev...

Nonpenetrating deep sclerectomy

www.expert-reviews.com ISSN 1746-9899 © 2009 Expert Reviews Ltd 10.1586/EOP.09.21 The goal of glaucoma filtration surgery is to reduce elevated intraocular pressure (IOP) in order to preserve residual viable elements of the optic nerve head. Trabeculectomy has been the ‘gold-standard’ filtration procedure for the last 40 years. In trabeculectomy, a full-thickness sclerostomy is created under a ...

There's No Such Thing as Best Practice

Comparison between phaco-deep sclerectomy converted into phaco-trabeculectomy and uneventful phaco-deep sclerectomy.

PURPOSE To evaluate and compare the results and complications of eyes that underwent a phaco-deep sclerectomy (DS) converted into phaco-trabeculectomy due to an intraoperative macroperforation with eyes undergoing uneventful phaco-DS. METHODS The authors reviewed 106 eyes having a planned phaco-DS; 10 of them (9.4%) had to be converted into phaco-trabeculectomy because of a large perforation ...

Why did some ichthyosaurs have such large eyes?

Many species of extinct marine ichthyosaurs had much larger eyes for their body size than would be expected of extant marine mammals and reptiles. Sensitivity to low light at great depth for the deep-diving genus Ophthalmosaurus has recently been suggested as the reason for the large eyes of these animals. Here, we discuss the implications for vision at such depths and consider other optical fa...