2 wks post frontalis sling silicon rod method ptosis surgery, my down-gaze is asymmetrical from my left eye. Is this permanent?

At two weeks, you are still very early in the procedure outcome process so do as the doctor says…wait, be patient, and then evaluate the outcome.

Congenital ptosis surgery is quite challenging. The levator muscle that is responsible for elevating the eyelid is malformed, and not only does it not work well to elevate the eyelid, it also does not stretch well in downgaze.

So I would suspect, that even before surgery, your right eyelid was not moving well in downgaze. The surgery may have exacerbated this situation, and it is a compromise that you would have to accept if you want your eyelid to look more symmetrical in the open, straight aheady position.

Your cornea will need to be evaluated  by an oculoplastics surgeon to assess dryness and your comfort also will help judge whether this is a tolerable situation for you.

This might be an acceptable result in a very abnormal eyelid.  

The most important issue here is eye comfort.  Is the operated eye comfortable?  If it is, then you are tolerating the sling surgery.  If your eye is not comfortable, then you are not tolerating the surgery.  This type of surgery is often not well tolerated and it may need to be adjusted or taken down altogether if the eye can not tolerate being open as the surgery itself interferes with blink function.  Young children adapt remarkably well to the surgery, but adults, not so much.  

If your surgeon was an ophthalmologist or oculoplastic surgeon, they are likely looking closely at the issue of how your eye is tolerating the new openness of the eyelids.  However, if your surgeon has some other type of training, I strongly recommend that you get immediately seen by an ophthalmologist or oculoplastic surgeon.