I’m afraid I can’t be of much help there other than many of us do have weakness in facial and eyelid muscles after a stroke that corrects over time. For some, the milder strokes, it probably improves that bit earlier than others.
The only eye issue I had was delayed tracking. For instance, when I’d look down, the eyeball would follow along after the head had turned down. But that right itself over time in the first year post stroke.
Speak with your physio about it and they will probably give facial exercises for it. What you’re currently doing yourself, holding it closed will be one of the exercises, scrunching and stretching your facial muscles, particularly the affected side in an exaggerated wink and similar. They may be able also suggest some gently massaging technique it help with stimulating the nerves.
But do also speak with your GP or your local stroke team if you haven’t been signed off yet. At the very least, you will need eye drops or ointment to prevent the eyeball from drying out and causing irritation.
Have your ordered your step yet 
Also
Looking back on one of your posts I came across this one 
I was 58 when I had my stroke, a mini stroke. Couldn’t walk, I cruised the furniture like a baby learning to walk, the hospital didn’t give me an walking aids. I couldn’t talk (aphasia), couldn’t use my arm or hold a cup, balance shot, cognition was shot, eyes delayed response in track, horrendous fatigue etc, etc, etc.
I’m just over 4yrs post stroke and coming up to my 63rd birthday. I walking hands free but do still have foot drop. I can talk although I still have a touch of aphasia, eyes are normal now, cognition is good, I’ve learned how to pace myself so I don’t get fatigued, I drive, I go to the gym and various other fitness classes 4/5 times a week and live a reasonably good life now. My stroke is my hobby now and I’m still making improvements 
Believe me, there is plenty hope for you yet
Yes, progress slows after the first 6 months, it can come in small increment’s in some areas or can just suddenly switch back on in others, such as it did with cognition for me. Other times it can be 2 steps forwards 1 step back, but it doesn’t stop progressing. But you only get out what you’re prepared to put in, use it or lose it. And never give up.
So if you can get yourself to a gym or any fitness classes for the over 50’s in your area, I highly recommend them, they’re excellent. motivators when you see the progress you make, they encourage and cajole you. I go to a strength & balance class run by Age UK which started out as solely chair based exercise which suited me at the time with my balance issue, but now I’m free standing in their circuit training class (which is actually called Stronger for Longer). There might be something similar in your area. Rehabbing at home can only do so much, monotony and boredom can hinder progress, variety stimulates progress.
Lorraine