A disclaimer, I cannot tell you exactly what your problem is. That being said your complaint has been posted before many times and it is something we see in the office regularly. Generally this occurs in people, especially women over 40, who sleep with a fan running in the bedroom. When we sleep our eyelids do not completely close. There is a small strip of eye that is exposed all night. If there is a fan running it often causes pain on awakening or as in your case 'sticking shut' The problem is more common in the winter when the air is dry and in people that have dry eyes (extremely common in women over 40 and males/females after 70). It can also occur in people that have eyelid problems where the eyes don't close normally (after Bell's Palsy, a facial stroke, or cosmetic eyelid surgery) Generally in the most common form the problem can be taken care of by turning off the fan, and using a nigh time lubricant. (Refresh PM, or other lubricants' that has GEL on it). Regular lubricating eye drops (artificial tears) only last 4 hours. GEL LUBRICANTS last all night. They are available at most all drugstores without prescription. DO YOU HAVE A FAN IN YOUR BEDROOM?