At our latest eye appointment his vision was not as clear in the ptosis eye. The doctor suspected it was from his eye getting dried out while sleeping so he had us use Refresh PM ointment in his eye at bedtime. It was a little easier to use with a six-year-old, but he still didn't like it. I mostly would just go into his room when he was already asleep, before I went to bed, and put some in his eye. The doctor rechecked his eyes two months later and his vision was again perfect. I have not been diligent about giving him the ointment every night since because I know that if his eye starts to get dry we can just moisten it again without a problem (He just told me his eye was starting to feel dry so I better start using it again).
Here are some pictures too: