نتایج جستجو برای: retinal nerve fiber layer
تعداد نتایج: 618734 فیلتر نتایج به سال:
Early attrition of nerve fiber bundles in glaucoma causes slit-like gaps to appear among the normally uniform, striated arcuate bundles of the retinal nerve fiber layer. The nerve fiber layer thins progressively, and its vessels become exposed as the defects coalesce, deepen, and widen with advancing disease. These changes in the peripapillary retina are exemplified photographically and compare...
We developed a mathematical model wherein retinal nerve fiber trajectories can be described and the corresponding inter-subject variability analyzed. The model was based on traced nerve fiber bundle trajectories extracted from 55 fundus photographs of 55 human subjects. The model resembled the typical retinal nerve fiber layer course within 20 degrees eccentricity. Depending on the location of ...
PURPOSE To evaluate the ophthalmoscopic appearance of the normal optic disc, parapapillary region, and retinal nerve fiber layer in rhesus monkeys. METHODS Color stereo fundus photographs of 17 normal eyes of 17 rhesus monkeys aged between 13 and 23 years were morphometrically evaluated. RESULTS The neuroretinal rim was significantly (P: < 0.008) broadest in the inferior disc region followe...
ABSTRACT Purpose: to compare the Subfoveal choroidal thickness (SFCT) and Retinal Nerve Fiber Layer Thickness (RNFL) of amblyopic normal fellow eyes. Design: Prospective, cross-sectional, observational case series. Methods: Forty patients age 12 41 years (mean 23.73 ± 6.42) with unilateral amblyopia were studied. Among them, 11(28.2%) had secondary strabismus 29(71.8 %) anisometropic amblyopia....
Background and Objective: In this study, the thickness of the retinal nerve fibers layer(RNFL) was compared among patients with mild cognitive impairment, Alzheimer's dementia, and healthy individuals (controls) using Optical Coherence Tomography (OCT) device. Materials and Methods: This case-control study was conducted on 30 patients diagnosed with mild cognitive impairment and 31 healthy sub...
The retinal nerve fiber layer (RNFL) is a vital part of human visual system, which can be directly observed by the fundus camera. This paper describes a method for glaucomatous retina detection based on Texture and Fractal description, followed by classification using support vector machine classifier. The color fundus images are used, in which the region of retinal nerve fibers are analyzed. I...
PURPOSE To investigate the vascular microcirculation changes in the retinal nerve fiber layer (RNFL) in normal, glaucoma suspect, and open-angle glaucoma (OAG) groups using optical coherence tomography-based microangiography (OMAG). METHODS One eye from each subject was scanned with a Cirrus HD-OCT 5000-based OMAG prototype system montage scanning protocol centered at the optic nerve head (ON...
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