C.M.
I do not have any words of widsom here, only that if you trust your doctor, then I think it sounds like it's the best. Better now when she's small and can't ask you why she has to be in pain, or be put under, or can't touch her eyes, etc. It's sad for you because she is so small (and that is completely understandable!) but just think about her having to go to her toddler years/older years with the eye issues if she didn't have it. Get family and friends to keep you company.
I'll keep your daughter and family in my prayers!