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

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 hemianopia damage 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