There is plenty of good information about
congenital ptosis out there. I know a lot of our concerns were right before and after surgery. There are also the ongoing concerns, including vision and
head posture.
This article is in academic-ese, but raises a good point about the difficulty of keeping both eyes working evenly--even after surgery. Reading between the lines, it's telling you that the other eye may have problems (this is something our surgeon never talked much about) after surgery to correct congenital ptsosis.
Here is a very interesting
video that discusses congenital ptosis, including birth trauma as a cause.
Again, I put up this page to engage other parents in discussion, so if you come across this, please do leave a comment about your experiences.
Here's a video where Tegan Quin of the wonderful Canadian sister act Tegan and Sara (yes, I have all of their albums) explains her ptosis.