Background: Contact lenses are transparent, thin plastic disks that cover the surface of the cornea. Appropriate lens prescription should be performed properly by an expert to provide better visual acuity and reduce side effects. The lens administration is a multi-stage, complex and time-consuming process involving many considerations. The purpose of this study was to develop a decision support...

In this research work, a multibeam antenna which is a combination of a beamformer network (BFN) and a linear array antenna, has been designed. A Rotman lens has been chosen as beamformer network and Vivaldi antennas have been selected for constructing array antenna. The Substrate Integrated Waveguide (SIW) was used for implementing Rotman lens. After explanation the structure of Substrate integ...

purpose: to evaluate visual function in patients with different types of light-filtering intraocular lenses (iols) methods: in this prospective comparative clinical study cataract patients with different types of iols in khatam-al-anbia eye hospital, mashhad were enrolled and followed for three months postoperatively. corrected distance visual acuity (cdva), color discrimination under photopic ...

PURPOSE To estimate the fitting parameters of the hybrid contact lens in patients with corneal ectasia using the rigid gas permeable (RGP) lens. METHODS Thirty-four eyes with corneal ectasia were evaluated in this study. The patients were examined once with the RGP lens and once with the hybrid contact lens. The relationship between the base curvature of the RGP and the vault of the hybrid le...

PURPOSE The present study was undertaken to explore the roles gap junctions play in lens epithelial cell differentiation. METHODS Recombinant retroviruses expressing three chick lens connexins (Cx)-Cx43, Cx45.6, and Cx56-were prepared and used to infect isolated chick lens primary cultures. The expression and distribution of proteins was determined using immunoblots and confocal immunofluores...

Many LED lighting applications involve the design of multiple optical surfaces. A prime example is a single lens with two refractive In this paper, we consider an light source approximated as point and far-field target intensity. Using Hamilton’s characteristic functions, problem converted into generalized Monge–Ampère equations by deriving generating function for each surface. The generalizati...

Fibrosis affects multiple organs and is associated with hyperproliferation, cell transdifferentiation, matrix modification and contraction. It is therefore essential to discover the key drivers of fibrotic events, which in turn will facilitate the development of appropriate therapeutic strategies. The lens is an elegant experimental model to study the processes that give rise to fibrosis. The m...

expense and have acceptably low revenue implications. Disturbances of cardiac rhythm are common in general practice,68 and Shaper was able to show electrocardiographic evidence of ischaemic heart disease in 15% of a large sample of men aged 40-59.9 Perhaps most tellingly, home care of patients with acute myocardial infarction cannot be contemplated without establishing the diagnosis. More recen...

A complex network graphics may be composed of hundreds and thousands of objects, such as nodes and edges. Each object may hold a large number of attributes that might be difficult to explore in the network visualization. Therefore, many visualization tools and approaches have been developed to gain more information from the network graphics. In this paper, we introduce the concept of the Networ...