This 6-year-old girl has a moderate left face turn.  With the face straight, a small angle left esotropia is seen.  Looking to either side it is clear that the left eye does not abduct fully and when this eye looks in adduction the palpebral fissure narrows and the eye becomes enophthalmic.

1.	The most likely diagnosis in this case is:
	a.  incomplete III nerve palsy b.  Duane syndrome c.  strabismus retractorius d.  Moebius syndrome
2.	The cause of the above is:
	a.  medial rectus fibrosis b.  the expression of Sherrington's law c.  co-contraction of the medial and lateral rectus of the left eye in adduction d.  none of the above
3.	All but one of the following is a true statement:
	a.  This condition is often treated surgically. b.  There are a variety of surgical approaches and surgeons do not always agree. c.  The condition becomes less symptomatic with time. d.  These patients frequently have excellent fusion.