Long Term Contact Lens Use and Mild Ptosis?

I'm a long term contact lens wearer (if you would consider 5-6 years long term) and have noticed some drooping in my left eye this last couple weeks. How long this has actually been happening, I'm not sure. I don't necessarily think it is a bad enough imbalance to seek surgery, but I'd just like to ask: - Can mild ptosis from lens wear be reversed with exercise or by eliminating the use of lenses? - What even is the likelihood of developing ptosis from contact lenses? 50%? 5%?