acanthamoeba keratitis is a vision- threatening infection and the most important risk factors are contact lenses characteristic symptoms include disproportionately severe ocular pain, epithelial ulcer, ring stromal infiltrate and resistance to antimicrobial treatment. the aim is to report the first cases of acanthamoeba keratitis in yazd in a retrospective study confirmed on histopathological a...

This paper presents a very compact, wideband, and enhanced-gain antenna for 5G applications. A simple single-layer millimeter wave (mm-wave) metamaterial lens (meta-lens) is used to improve the gain, aperture efficiency, gain bandwidth of slotted-patch over wide range frequencies from 25 GHz 31 GHz. The exhibits negative refractive index behavior, which attributed substantial enhancement around...

Ultrasonography is the only practical method for obtaining images of the posterior segment of the eye when the light-conducting media are opaque. In this study, 182 dogs with ocular abnormalities presented to the Department of Veterinary Surgery and Radiology from December 2008-August 2010 were included. All the animals were subjected to detailed ophthalmic examination and B-scan ultrasonograph...

Introduction: Utilization of computed tomography (CT) scans is increasing annually. This study aimed to reduce the absorbed dose of sensitive organs in the head (eye lenses and thyroid) and to assess changes in resultant images quality in head scans when the radiation dose is decreased. Material and Methods: An anthropomorphic phantom was examined with head protocols in both helical and sectio...

introduction: some fungi such as aspergillus, alternaria, cladosporium and fuzadium can peneterate matrix of contact lens. alternaria is a saprop and a pathogen in plants which is rarely seen in human being. this paper reported one case of contact lens contamination with alternaria in human. case report: the patient is a 24 year old woman who had used contact lens for 7 months. since she was on...

Small refractive errors present a group of specifc far-sighted refractive dispositions that are compensated by enhanced accommodative exertion and aren't exhibited by loss of the visual acuity. This paper should answer a few questions about their correction, flowing from theoretical presumptions and expectations of this dilemma. The main goal of this research was to (dis)confirm the hypothesis ...

In discussing spasticity and its pathophysiology we presented evidences for cellular alteration and their neurocontrol. We outline clinical practice of recognizing and describing spasms and spasticity in order to emphasize residual descending influence to the spinal cord. Finally, we provide published evidences that such residual descending influence can be exerted under an attempt of an altere...

Marfan syndrome (MFS) is a genetic disorder which is inherited by autosomal dominant traits. In MFS, lens displacement and cardiovascular involvement are important causes of morbidity and mortality in the clinical course of the disease. In this case study, the ocular involvement in a family with severe penetration of MFS is reported. Twelve members of a family (father, two daughters, three sons...