1. Observe
    * anisocoria / heterochromia
    * ocular alignment
    * scars on the forehead or lids from previous surgery

2. Measure the palpebral fissure by getting the patient to look at distance
    Note: Some examiner may want you to do pupil margin reflexes

3. Measure lid creases in both eyes

4. Levator excursion

5. Check for Bell's phenomenon, corneal sensation

6. Others:
    * jaw-winking especially in children
    * ocular movement for third nerve and myasthenia gravis
    * Cogan's twitch in myasthenia gravis.
  In the ptosis examination, you have to show the examiner that you can :

 1. Perform ptosis examination satisfactorily from the surgical point of view.
    You are  likely to be asked the type of ptosis operation that you know of and its
    indication.
 
2. Find out the cause of the ptosis.For this you need to perform other tests such 
    as ocular motility and  jaw-winking
 

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