نتایج جستجو برای: optic nerve hypoplasia
تعداد نتایج: 201064 فیلتر نتایج به سال:
PURPOSE To report on the clinically important differences between nasal optic hypoplasia (NOH) and glaucoma with NOH-like temporal visual field defect (VFD). METHOD Five NOH (four bilateral and one unilateral) patients, three unilateral NOH patients with glaucoma, and two glaucoma patients with NOH-like temporal VFD were clinically characterized. Superior segmental optic nerve hypoplasia was ...
P eriventricular leucomalacia is an end stage lesion that results from hypoxic-ischaemic injury to the white matter of the developing brain. This condition occurs in 32% of premature infants and is believed to develop between the 24th and 34th weeks of gestation. Periventricular leucomalacia most commonly involves the optic radiations adjacent to the trigone of the lateral ventricle, and the an...
Congenital lesions of a cerebral hemisphere may involve its optic tract primarily or trans-synaptically. Such lesions produce a distinctive retrograde hypoplasia in each optic nerve and retina (Fig. I, overleaf) which we have identified ophthalmoscopically and have named homonymous hemioptic hypoplasia. This report describes and illustrates fundoscopic features of this neuro-ophthalmological an...
INTRODUCTION The incidence of facial cleft is rare and ranges between 1.43 and 4.85 per 100,000 births. To date, there have been few reports of detailed ophthalmologic examinations performed in cases of facial cleft. Here, we report a case of optic-nerve hypoplasia and anterior segment abnormality associated with facial cleft. CASE REPORT A 9-day-old female infant was delivered by cesarian se...
purpose: to report a case of unilateral severe visual loss and bilateral optic disc cupping secondary to brain metastasis of bronchogenic carcinoma patient and findings: a 48 year-old woman presented with severe visual loss of left eye without redness or pain or any systemic findings .clinical findings included decreased visual acuity of left eye to 4 m cf and (+3) positive marcus-gunn reflex ....
Malformations of the optic nerve lead to reduced vision or even blindness. During optic nerve development, retinal ganglion cell (RGC) axons navigate across the retina, exit the eye to the optic stalk (OS), and cross the diencephalon midline at the optic chiasm en route to their brain targets. Many signalling molecules have been implicated in guiding various steps of optic nerve pathfinding, ho...
Septo-optic dysplasia (SOD) is a rare disorder associated with optic nerve hypoplasia, pituitary abnormalities and agenesis/dysgenesis of midline brain structures including the septum pellucidum and corpus callosum. Though sometimes associated with drug-resistant epilepsy, this association has not been well studied. We report six SOD patients with associated malformation of cortical development...
Schizencephaly is a rare malformation of the central nervous system. Both genetic and non-genetic etiologies like prenatal infections or ischemia have been postulated. Clinical manifestations most often include varying degrees of developmental delay, motor impairment and seizures. It can be associated with septo-optic dysplasia (SOD), optic nerve hypoplasia and absence of septum pellucidum, pac...
Assessment of the peripapillary nerve fiber layer and macular thickness can be determined in ophthalmology using optical coherence tomography (OCT). Decreased nerve fiber layer thickness and macular ganglion cell thickness in optic nerve ischemia have been correlated with visual field loss. OCT allows deep optic nerve head evaluation which helps understand pathophysiology of diseases. Furtherm...
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