Name the type and age of the three types of early strabismus. 

1.  Essential infantile strabismus<4mos.

2.  Early Acquired Strabismus>4mos.<2 yrs.

3.  Late Acquired strabismus >2 yrs.

How young should the infant be to ask the parent in what month the strabismus was noticed?

<2 years, ask which month the parent first noticed the strabismus

1.  epicanthal folds

2.  negative angle kappa

3.  narrow IPD

4.  other cosmetic factors