Can someone help?

I'm hoping someone can help me, I have congenital facial nerve palsy with eyelid ptosis (drooping) in both eyelids.
In the past year I've noticed when I drink or eat something sour such as orange juice, sour candies, or grapefruit my eyelids will open completely this only lasts for 10-30 seconds the longest it's lasted was about 1 minute.
Before this it was impossible to move my eyelids at all and i could only close them lightly. I'm very curious about this could it be some form of synkinesis? somehow my eyelids only do this when I taste something sour. It almost feels like my eyelids are being pried open with a vice. Does anyone have any ideas of what this could be? I have scoured the internet and found nothing similar.