Optic Nerve Disease,Papillaedema Optic Atropy, Visual Field
Transcript of Optic Nerve Disease,Papillaedema Optic Atropy, Visual Field
Optic nerve disease
papilloedema
optic atropy,
visual field defects
Optic nerve diseases
• Definitions Optic disc oedema swollen disc, used to describe the optic nerve head affected by a variety of local and systemic
causes Papilloedema swollen disc due to increased intracranial pressure
Optic nerve diseases
Disc oedema
• Definition Optic disc oedema swollen disc, used to describe the optic nerve head affected by a variety of local and systemic causes
Disc oedema
Disc oedema
Disc oedema• Arteritic
Disc oedema
• Papilloedema causes -space occupying lesions -blockage of the ventricular system (congenital or acquired)
-obstruction of CSF absorption -benign intracranial hypertension -severe hypertension -hypersecretion of CSF
Optic nerve diseases
• Papilloedema -bilateral disc oedema -hyperaemia of disc -absent venous pulsation in the disc -splinter haemorrhage -exudates -cotton wool spots -circumferential retinal folds -paton’s lines -obliterated central cup
Disc oedema
• Papilloedema swollen disc due to increased intracranial pressure
Disc oedema• Papilloedema
Optic Atrophy
• Causes
-central retinal artery occlusion-healed papillitis
-glaucoma -hereditary optic neuropathies -toxic and deficiency optic neuropathies -infiltrative optic neuropathy -radiation optic neuropathy -cacinomatous optic neuropathy
Optic Atrophy• Clinical diagnosis of optic atrophy
• ophthalmoscopic abnomalities of disc
• defective visual function -visual acuity -colour vision -pupils -visual fields -visual evoked potentials(VEP)
Optic Atrophy
Optic Atrophy
Visual field defects• Normal visual field
Visual field defects
Visual field defects
• Blind right eye with left temporal hemianopia R-optic nerve lesion extending into the chiasm
Visual field defects
Visual field defects
Visual field defects
Visual field defects
Visual field defects
• Bitemporal hemianopia due to interruption of decussating nasal fibres in chiasm
Visual field defects
Visual field defects
Visual field defects
• Central bitemporal hemianopiadamage of nasal macular fibres in the chiasm
Visual field defects
• L homonymous hemianopia, R optic tract, or occipital lesion
Visual field defects
• L homonymous superior quadrantanopia R temporal lobe(Meyer’s loop)lesion
Visual field defects
• R homonymous hemianopia with macularsparing
L occipital cortex lesion
Visual field defects
Visual field defects