Didi, the possibilities here are:
1. Eyelid Fasciculations – harmless twitching
2. Blepharospasm – usually both eyes, may need botox, harmless
3. Hemifacial Spasm – involves half of face, potentially dangerous.
I don’t know why sugar levels are being checked, unless there is some kind of nerve palsy going on as well. These are all questions best asked of the eye doctor who has seen your husband.
Comment by Timothy Root, M.D. — January 22, 2014