I too have a paralyzed facial nerve and my eye has been unbelievably painful and uncomfortable for 7 months since my surgery. At times I can't believe how much it hurts. I have had the scleral lens since monday and yesterday I had ZERO pain or discomfort all day. The minute I removed it the irritation started. It does need to be removed at night.
A scleral lens holds saline which keeps the eye moist all day. I find I need moisture drops through the day but nothing like I was doing before. I do not produce tears or blink so that has to be managed. I too was leary of putting something in my eye, but was amazed at how quickly it went from intolerable to feeling almost normal.
Most doctors know nothing about using a scleral lens for this. My neuro and neuro opthamologist never heard of it. The opthamologist didn't think it would work and was recommending surgery to tighten the lid etc. I am happy to educate both of them. The lens fitter immediately said it would help. He was awesome and correct.
I too suggest you look into this. Life can be better