I happen to have MG and PD at the same time. It's sometimes hard to determine which to blame for some symptoms. I started to take MG meds and it helped with the strength of my limbs but did nothing for my Ptosis. My Ptosis can be very severe in my home or in a car (passenger) or in bright sun light. But in most cases at restaurants or doctors office its much better. Various stimuli can make a major difference, Hard to treat something so sporadic. I am seeing a neuro-ophthalmologist but hes so busy it takes 3-4 months just so he can prescribe eye drops that don't work.