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Chapter: Medicine Study Notes : Neuro-sensory

Optic Nerve Lesions

Optic atrophy: pallor of the optic disk, and damage to the retinal nerve layer, optic nerve or tract leading to Decrease visual acuity or field loss. Due to neuritis, compression, ischaemia, glaucoma

Optic Nerve Lesions

 

·        Optic atrophy: pallor of the optic disk, and damage to the retinal nerve layer, optic nerve or tract leading to ¯visual acuity or field loss. Due to neuritis, compression, ischaemia, glaucoma

 

·        Optic Neuritis: Age 18 – 40, more common in women. Pain on movement of eye, with central fog patch, colour desaturation. Worsens over hours to days, may lose sight completely, gradually improves over 4 – 6 weeks. 70% chance of developing MS over 10 years

 

·        Anterior Ischaemic Optic Neuropathy: Sudden painless unilateral visual loss in an older person. Seldom improves. Due to occlusion of the arterioles to the optic nerve head

 

·        Compressive Optic neuropathy: insidious loss of central vision in one eye, especially colour. Usually meningioma of optic nerve

 

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Medicine Study Notes : Neuro-sensory : Optic Nerve Lesions |


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