eyelids

Can anybody tell me if my baby's eye has a problem? Or is it just one is double eyelid and one is single eyelid? Any mummies with children having ptosis? Her eye one can open fully one seems a little "lazy" and doesnt seem to open as big as her normal eye. The eyeball don't have an issue as I can see it moving together when she tracks an object. So it's the eyelid... Thanksss