نتایج جستجو برای: optic disc duplication
تعداد نتایج: 106640 فیلتر نتایج به سال:
BACKGROUND To evaluate a case of atypical optic neuropathy that presented with blurred vision following the use of an antiarrythmic agent. CASE Record of the patient was reviewed to determine the etiology of his optic neuropathy. OBSERVATIONS Ophthalmological examination revealed unilateral optic disc edema with relatively well-preserved visual acuity. In routine tests, results of complete ...
PURPOSE To report a case of bilateral anterior ischaemic optic neuropathy due to buried optic disc drusen. METHODS Case report. RESULTS A 64-year-old man presented with swollen optic discs and features suggestive of anterior ischaemic optic neuropathy (AION) in the left and right eye on two separate occasions ten months apart. Detailed ocular examination at presentation and systemic investi...
PURPOSE To determine the feasibility of adapting confocal scanning laser (CSL) tomography of the optic disc for quantitative evaluation of papilledema in pseudotumor cerebri (PTC). METHODS Confocal scanning laser tomography of the optic disc was performed in 11 patients with diagnosed PTC and 12 visually normal control subjects of similar age. In five patients with active papilledema, CSL tom...
PURPOSE The aim of this study was to investigate factors associated with the signal strengths (SS, image quality scores) of optic disc and macular images obtained using Cirrus spectral domain optical coherence tomography (OCT). METHODS Ninety-two glaucomatous eyes were imaged using the Cirrus OCT macular and optic disc cube modes after pupil dilation. The influences of patient age, spherical ...
In 1851, the introduction of the ophthalmoscope by Von Helmholtz revolutionized ophthalmology. With the ophthalmoscope, Von Graefe and others at the time were the first to visualize the optic disc of blind patients in whom the eyeballs were firm but noncongested. They classified this condition as simple glaucoma and labeled the appearance of the optic disc as ‘cupped’. Since then, the term ‘cup...
PURPOSE To determine the effect of optic disc drusen on the latency of the pattern-reversal checkerboard visual evoked potentials (VEPs) and multifocal (mf)VEPs and to better understand the pathophysiology of the condition. METHODS Eighteen eyes with optic disc drusen (10 patients) and 38 control eyes (19 subjects) underwent VEP, mfVEP, and visual field testing. Only one eye of each individua...
OBJECTIVE To quantify an apparent nasotemporal asymmetry in the location of retinopathy of prematurity with respect to the optic disc. METHODS Twenty-four-bit color images were captured using a contact digital fundus camera during routine screening. Semiautomated measurements were undertaken to determine the distance between the optic disc and retinopathy located in the nasal and temporal reg...
INTRODUCTION Pseudo-Foster Kennedy Syndrome is described as unilateral optic disc swelling with contralateral optic atrophy in the absence of an intracranial mass causing compression of the optic nerve. This occurs typically due to bilateral sequential optic neuritis or ischaemic optic neuropathy. CASE PRESENTATION We describe a case of pseudo-Foster Kennedy Syndrome in a two year old boy wit...
Glaucoma is a chronic eye disease that leads to vision loss. As it cannot be cured, detecting the disease in time is important. Current tests using Intra Ocular Pressure (IOP) are not sensitive enough for population based glaucoma screening. Optic nerve head assessment in retinal fundus images is both more promising and superior. The method to segment optic disc and optic cup using Simple Linea...
Optical coherence tomography has evolved over the past 2 decades to be an important ancillary method to evaluate diseases of the anterior and posterior segments of the eye. The more recent development of swept-source optical coherence tomography (SS-OCT) with a wavelength-tunable laser centered at 1050 nm and deeper imaging depth of 2.6 mm has enabled clinicians to evaluate congenital optic dis...
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