Purpose: To compare the effect of 20% sulfur hexafluoride (SF6) with that of air on graft detachment rates for intraocular tamponade in Descemet membrane endothelial keratoplasty (DMEK). Methods: Forty-two eyes of patients who underwent DMEK by a single surgeon (A.S.J.) at Wilmer Eye Institute between January 2012 and 2014 were identified; 21 received air for intraocular tamponade and the nex...

A rational calculation of the rill detachment rate (RDR) and an accurate simulation process are important for determining model parameters hillslope erosion. Here, we found a difference between RDRs calculated using different methods that cannot be ignored. This study proposes modified numerical method based on dataset measured sediment concentrations along length over saturated loess soil slop...

OBJECTIVE To compare anatomic and visual acuity outcomes, as well as complication rates, after retinal detachment repair using 1000- vs 5000-centistoke silicone oil. METHODS Records of all patients who underwent retinal detachment repair with silicone oil at one institution between January 1, 1995, and December 31, 2000, were reviewed. Anatomic outcomes included retinal redetachment and macul...

A mechanics-based mathematical model for retinal detachment is developed, incorporating an energy-based criterion for propagation. Retinas with and without central tears are considered and contraction of the vitreous and extension of its fibrils, along with a pressure difference across the retina, are taken as the stimuli for detachment propagation. In addition to the equations of motion, bound...

Measuring the volume of a bubble, especially at its detachment, is a basic subject in gas-liquid two-phase flow research. A new indirect method for this measurement under constant flow conditions is presented. An electronic device is designed and constructed based on laser beam intensity. This device calculates the frequency of the bubble formation by measuring the total time of the formation p...

OBJECTIVES Several observational studies have been published investigating the association between oral fluoroquinolone use and the development of retinal detachment; however, the findings are not concordant. This study is a meta-analysis of the existing literature and estimates the overall absolute risk of such an event. METHODS Electronic databases were searched for observational studies on...

We present a rate equation model for submonolayer island growth under conditions where hyperthermal deposition techniques such as low-energy ion deposition are employed to achieve smooth layer-by-layer growth. By asymptotic analysis, we demonstrate that the model exhibits stationary behavior with well-defined dynamic and growth exponents beta and chi, respectively, in the limit of small and hig...

An experiment was initiated on Sharpsburg silty clay loam (fine, montmorillonitic, mesic Typic Argiudoll) in 1981 to compare the effects of fertility management and crop practices on splash detachment of soil. Experimental treatments included comparisons of crop rotations of soybean [Glycine max (L.) Merr.| after corn (Zea mays L.) (SB), corn after soybean (C), and oat/red and yellow sweetclove...

OBJECTIVES To evaluate the surgical outcome for patients with rhegmatogenous retinal detachment and to find out the factors influencing the anatomic reattachment and visual results. MATERIAL AND METHOD Retrospective review of the medical records of patients for the following details: age, sex, time to diagnosis, time to surgery, phakic status, types, numbers and locations of the retinal break...

A kinetic model is proposed to assess the feasibility of strategies for the removal of biofilms by using substances that induce detachment by affecting the cohesiveness of the matrix of extracellular polymeric substances (EPSs). The model uses a two-state description of the EPS (natural EPS and compromised EPS) to provide a unified representation of diverse mechanisms of action of detachment-pr...