So, it takes a while for their vision to sharpen after they open their eyes but at what age do you expect they have normal visual?

When pups open their eyes it may take just a couple of days to adjust but normal "vision" should begin almost at once. Nothing like the 1st time the babies recognize you!!

It is magical when those eyes open and they look right at you!

I think it might take a couple of days. Once I had a pup with eyes that were a bit hazy looking. The vet pup something in the pups eyes and they were clear within days. Best of luck.