purpose : round-the-clock on-demand availability and corneal cloudiness are the two major problems with animal eyes for surgical practice. the purpose of this investigation is to assess the usability of long-term deep freezing for the preservation of enucleated sheep eyes and the adjunctive role of intracameral cryoprotective agent on corneal clarity. methods : thirty-two enucleated fresh sheep...

we study the history and recent developments in nonelementarymodel theory focusing on the framework of abstractelementary classes. we discuss the role of syntax and semanticsand the motivation to generalize first order model theory to nonelementaryframeworks and illuminate the study with concrete examplesof classes of models. this first part introduces the main conceps and philosophies anddiscu...

A slit-lamp fluorophotometric method is presented that permits calculation of a blood-retinal barrier permeability to fluorescein (P) and a diffusion coefficient for fluorescein in the vitreous body (D). The calculations are performed by relating the time course of the free--not protein bound--fluorescein concentration in the bloodstream with the fluorescein concentration profile in the vitreou...

Intravitreal injections show an avalanche-like growth the world over. Purposes: 1) create a mathematical model of eyeball and fluid movement inside eye, assuming simplified structure vitreous body (without tanks); 2) estimate time span when drug substance remains in cavity until it is completely washed out, depending on injection site; 3) observe evaluate path cavity; 4) variation located cavit...

Introduction International Commission on Radiological Protection (ICRP) has provided a comprehensive discussion on threshold dose for radiation-induced cataract in ICRP publication 116. Accordingly, various parts of the eye lens have different radio-sensitivities. Recently, some studies have been performed to develop a realistic eye model with the aim of providing accurate estimation of fluence...

Most manufacturers use human-machine systems to produce high-quality products. Dealing with human-machine systems is very complicated since not only machines should be utilized in proper condition but also appropriate environment should be provided for human resources. Most manufacturers have a maintenance plan for machines but many of them do not have a proper work-rest schedule for human reso...

Objective. The aim of the study is to develop a mathematical model for determining temperature field human eyeball under thermal influence on its anterior segment. Method. A has been developed determine when exposed Result. dependences characteristic points inside time during cyclic exposure heat flow segment are obtained, as well graphs distribution along optical axis applying flow. Conclusion...