When I Wake Up During The Night I Have Difficulty

When I wake up during the night I have difficulty opening my eyes (the left is worse than the right). If I have to get up, I manage to open at least the right eye just enough to see where I am going. My eyes are very light sensitive during the night, making it difficult to keep them open. It seems as if my eyes lids are stuck closed, but there isn't any residue around my eye lids. At night I use eye drops (tears) before going to bed but haven't noticed any improvement.
Any thoughts?
Thanks