[hinckley buzzard]

I see Parkinson's patients everyday, none wear blue glasses. But some anti-Parkinson drugs can affect the eyes ability to adapt to light, marking for blurred vision and possibly photo sensitivity. She may be wearing them to counter a drug side effect..

[wrench]

Any suffer from Dyskinesia Tremors?

This is why some wear the blue glasses.

http://www.colorglasses.com/Color-Therapy-Medical-Benefits/Parkinsons-Disease-Blue-Glasses/