OCT-based crystalline lens topography in accommodating eyes
نویسندگان
چکیده
منابع مشابه
OCT-based crystalline lens topography in accommodating eyes.
Custom Spectral Domain Optical Coherence Tomography (SD-OCT) provided with automatic quantification and distortion correction algorithms was used to measure anterior and posterior crystalline lens surface elevation in accommodating eyes and to evaluate relationships between anterior segment surfaces. Nine young eyes were measured at different accommodative demands. Anterior and posterior lens r...
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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 ...
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The purpose of this manuscript is to introduce a new age-dependent model of the human lens with two GRIN power distributions (axial and radial) that allow decoupling of its refractive power and axial optical path length. The aspect ratio of the lens core can be held constant under accommodation, as well as the lens volume by varying the asphericity of the lens external surfaces. The spherical a...
متن کاملOCT predicts VEGF levels in human eyes.
Sonoda et al. reported a new aspect of diagnostic imaging by optical coherence tomography (OCT) in their manuscript, ‘‘Correlation between reflectivity of subretinal fluid in OCT images and concentration of intravitreal VEGF in eyes with diabetic macular edema.’’ Neudorfer and the authors found that OCT reflectivity is variable in subretinal fluid in diabetic macula edema cases. They have alrea...
متن کاملDistortion correction of OCT images of the crystalline lens: gradient index approach.
PURPOSE To propose a method to correct optical coherence tomography (OCT) images of posterior surface of the crystalline lens incorporating its gradient index (GRIN) distribution and explore its possibilities for posterior surface shape reconstruction in comparison to existing methods of correction. METHODS Two-dimensional images of nine human lenses were obtained with a time-domain OCT syste...
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ژورنال
عنوان ژورنال: Biomedical Optics Express
سال: 2015
ISSN: 2156-7085,2156-7085
DOI: 10.1364/boe.6.005039