Are there any exercises that can help ptosis?

None. Eyelid ptosis is a droop of the upper lid due to muscle weakness or malposition. Surgery is the only permanent corrective. There is a temporary appliance hooked onto glasses called a ptosis crutch which can lift the lid but this is uncomfortable and not a long term solution. No exercises will help.
No. Assuming that you're referring to ptosis of the breast, unfortunately there's nothing that can be done to help the ptosis in terms of exercise. The problem is a soft tissue looseness and the main three ways to help correct it would be a using an implant , doing breast lift or a combination of both.