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Abnormal Pupils, Visual Fields (Homonymous Hemianopia Retrochiasmatic …

- - - - Compresses from below → descending visual loss
    - - Compresses from above → ascending visual loss
      - Benign suprasellar tumour originating from
        Rathke’s pouch.
      - Calcified as arises from odontogenic epithelium
- - - - Optic chiasm: nasal fibres decussate
        
        Optic tract
        
        LGN of thalamus
        
        Optic radiation
        
        Superior field: temporal
        
        Inferior field: parietal
        
        1 more item...
- - - - Complete ptosis
      - Down and out in rest position
      - ± dilated, non-reactive pupil
      - Diplopia maximal: in and up
  - - - Slight head tilt: ocular torticollis
      - Appear normal in rest position
      - Failure to depress eye in adduction
      - Diplopia maximal down and in
      - Ask if pt. has trouble walking down stairs
  - - - Appear normal in resting position
      - Failure to abduct
      - Diplopia maximal in abduction
      - Commonly a false localising sign of ↑ ICP: contralateral lesion
- - - - DM: glucose + HbA1c
      - TFT: ↓TSH
      - MG: anti-AChR antibodies
    - - Plaques in the periventricular white matter
- - - - Nystagmus
      - Diplopia: do cover test
      - Ophthalmoplegia
  - - - Ptosis
      - Alignment
      - Pupil sizes