The following patients have anisocoria.
 

	Patient A A patient with sixth nerve palsy.
	Patient B A heavy smoker with haemoptysis.
	Patient C A patient with  neurofibromatosis  and spastic paresis.
	Patient D A patient with recent neck injury.

What other ocular signs may be observed?

Answer
All these patients have Horner's syndrome. In addition to meiosis, there is mild ptosis and apparent enophthalmos. 
 

What test may be used to confirm the diagnosis of the abnormal pupil?

Answer
4% cocaine test can be used. In Horner's syndrome, cocaine fails to dilate the miotic pupil.
 

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