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Vision and Pathways

Vision and Pathways. S Gautam. Vision. Pathways. Superior Temporal Quadrantanopia. How is it caused at the optic chiasm?. Pupils. Horner’s Syndrome Sympathetic injury One sided pupillary constriction Ptosis Caused by anything injuring sympathetic chain or pathway. Homes Adie Pupil

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Vision and Pathways

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  1. Vision and Pathways S Gautam

  2. Vision

  3. Pathways

  4. Superior Temporal Quadrantanopia • How is it caused at the optic chiasm?

  5. Pupils • Horner’s Syndrome • Sympathetic injury • One sided pupillary constriction • Ptosis Caused by anything injuring sympathetic chain or pathway

  6. Homes Adie Pupil • Postganglionic parasympathetic nerve damage • Tonically dilated pupil • Slow to constrict • Absent tendon reflexes • Excessive sweating

  7. Argyll Robertson Pupil • Prostitute’s pupil (accommodates but doesn’t react) • Specific to syphilis (treponema pallidum) • Uncommon these days

  8. Amaurosis Fugax • Sudden visual loss • Painless • Fleeting to minutes • ‘Curtain’ across the vision • Ipsilateral carotid or ophthalmic artery

  9. Holmes Adie Pupil

  10. Vitreous Haemorrhage • Painless loss of vision • Unilateral • Floaters, cobweb, haze, shadow • High myopia risk factor • Can be precursor for detachment

  11. Retinal Vein Occlusion • Loss of vision • Usually on awakening • Underlying coag. disorders • Flame haemorrhages • Risk Factors • DM • Smoking • Hyperlipidemia

  12. Retinal Artery Occlusion • Almost instant loss of vision • Painless • Usually elderly >60 • Pale retina • Cherry red spot (foveola) • Preceding amaurosis fugax

  13. Thank You

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