BACKGROUND The purpose of this study was to assess whether differences in central corneal dendritic immune cell densities associated with combinations of soft contact lenses and lens care solutions could be detected by in vivo confocal microscopy. METHODS Participants were adults naïve to contact lens wear (n = 10) or who wore soft contact lenses habitually on a daily-wear schedule (n = 38) o...

PURPOSE Platelet-derived growth factor (PDGF) has previously been shown to influence lens growth and transparency. The purpose of the present study was to investigate the expression of the PDGF receptor and its mRNA during lens development in chicken embryos. METHODS To examine the expression of PDGF receptor mRNAs, the authors used a combination of polymerase chain reaction, Northern blot an...

Recovery of corneal sensitivity was determined in hard contact lens wearers 2, 4, 6, 12, and 24 hr after removing the lenses. The extent of recovery was shown by the statistical similarity of the threshold values for the contact lens group and the thresholds of a group of subjects who had never worn contact lenses. Consideration of the time course of recovery and of the thermal modality of the ...

TiO2 nanorods are synthesized by a thermal corrosion. In present work, synthesis of TiO2 nanorods in anatase, rutile and Ti8O15 phases, by using the sol-gel method and alkaline corrosion are reported. The morphologies and crystal structures of TiO2 nanorods are characterized by use of field emission scanning electron microscopy, atomic force microscopy and X-ray diffractometer techniques. The o...

nanocrystalline zno particles were prepared by a novel sonochemical route from zinc acetate and sodium hydroxide without any requirement of calcination steps at high temperature and without surfactants. variations in several parameters and their effects on the structural (crystal size and morphology) properties of nanoparticles were investigated. characterizations were carried out by x-ray diff...

Submitted for the MAR05 Meeting of The American Physical Society Nanomagnetic Planar Magnetic Resonance Microscopy “Lens” MLADEN BARBIC, California State University, Long Beach, AXEL SCHERER, Caltech — The achievement of three-dimensional atomic resolution magnetic resonance microscopy remains one of the main challenges in visualization of biological molecules. The prospects for single spin mic...

During the 3-h developmental stage 14 in the chick, intercellular transfer of iontophoresed fluorescent dyes becomes less sensitive to the lowering of intracellular pH by either CO2 or acetate ions. Up to developmental state 14, dye transfer between lens cells is reversibly blocked by exposure to 50% CO2. Beyond stage 14, dye transfer between these cells is no longer reversibly blocked by eleva...

Two nano-sized mixed-ligand Cd (II) coordination polymers; [Cd (4,4' -bpy) (C4H4O4)].1/4 H2O (1) and[Cd(bpy)1.5 (NO3)2].3H2O (2) (bpy=bipiridine) were synthesized by a sonochemical method and characterized by elemental analyses, thermal gravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). The cry...