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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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superior temporal quadrantanopia
Superior Temporal Quadrantanopia
  • How is it caused at the optic chiasm?
pupils
Pupils
  • Horner’s Syndrome
    • Sympathetic injury
    • One sided pupillary constriction
    • Ptosis

Caused by anything injuring sympathetic chain or pathway

slide10
Homes Adie Pupil
    • Postganglionic parasympathetic nerve damage
    • Tonically dilated pupil
    • Slow to constrict
    • Absent tendon reflexes
    • Excessive sweating
slide11
Argyll Robertson Pupil
    • Prostitute’s pupil (accommodates but doesn’t react)
    • Specific to syphilis (treponema pallidum)
    • Uncommon these days
amaurosis fugax
Amaurosis Fugax
  • Sudden visual loss
  • Painless
  • Fleeting to minutes
  • ‘Curtain’ across the vision
  • Ipsilateral carotid or ophthalmic artery
vitreous haemorrhage
Vitreous Haemorrhage
  • Painless loss of vision
  • Unilateral
  • Floaters, cobweb, haze, shadow
  • High myopia risk factor
  • Can be precursor for detachment
retinal vein occlusion
Retinal Vein Occlusion
  • Loss of vision
  • Usually on awakening
  • Underlying coag. disorders
  • Flame haemorrhages
  • Risk Factors
    • DM
    • Smoking
    • Hyperlipidemia
retinal artery occlusion
Retinal Artery Occlusion
  • Almost instant loss of vision
  • Painless
  • Usually elderly >60
  • Pale retina
  • Cherry red spot (foveola)
  • Preceding amaurosis fugax