Introduction: Optical coherence tomography is a technology that allows obtaining high resolution images of tissues in vivo, enabling the measurement of ocular structures, including the retinal nerve fiber layer and macular thickness. As a noninvasive test it’s particularly useful in children, but its applicability is limited by the existence of normative values for adults only. Purpose: To esta...

AIMS To establish a reliable method for measuring the axial length of the eye with incomplete filling of silicone oil in the vitreous cavity in order to determine the IOL power before executing combined cataract surgery and silicone oil removal. METHODS 12 eyes of 12 patients undergoing combined cataract extraction and silicone oil removal between October 1998 and June 2000 were entered prosp...

INTRODUCTION Optical coherence tomography is a technology that allows obtaining high resolution images of tissues in vivo, enabling the measurement of ocular structures, including the retinal nerve fiber layer and macular thickness. As a noninvasive test it's particularly useful in children, but its applicability is limited by the existence of normative values for adults only. PURPOSE To esta...

in this paper, scattering of a plane and monochromatic electromagnetic wave from a nano-wire is simulated using surface integral equations. first, integral equationsgoverning unknown fields on the surface is obtained based on stratton-cho surface integral equations. then, the interaction of the wave with a non-plasmonic as well as a palsmonic nano-wire is considered. it is shown that in scatter...

We present a general theory of optical coherence tomography (OCT), which synthesizes the fundamental concepts and implementations OCT under common 3D k -space framework. At heart this analysis is Fourier diffraction theorem, relates coherent interaction between sample plane wave to Ewald sphe...

PURPOSE Accommodation is a dioptric change in power of the crystalline lens resulting from ciliary muscle contraction that leads to an increase in lens surface curvatures and thickness and changes in the position of lens surfaces. Previous studies have used A-scan ultrasound to measure changes in the position of lens surfaces with voluntary accommodation, but have not simultaneously measured th...

A guided-mode resonance (GMR) sensor with multiple resonant modes is used to measure the collection of biomolecules on surface and index refraction environment (bulk). The number variables that can be monitored (biolayer refraction, biolayer thickness, bulk, or background, refraction) determined by supported are sensitive changes in these variable values. we use has a grating homogeneous layer,...

Scintillators play a key role in the detection chain of several applications which rely on use ionizing radiation, and it is often mandatory to extract detect generated scintillation light as efficiently possible. Typical inorganic scintillators do however feature high index refraction, impacts extraction efficiency negative way. Furthermore, such preclinical Positron Emission Tomography (PET) ...

Custom high-resolution high-speed anterior segment spectral domain optical coherence tomography (OCT) was used to characterize three-dimensionally (3-D) the human crystalline lens in vivo. The system was provided with custom algorithms for denoising and segmentation of the images, as well as for fan (scanning) and optical (refraction) distortion correction, to provide fully quantitative images ...