If this is not picked up and treated immediately, the cornea can be lost and the patient left blind. Tears Natural R or some other wetting agent can be prescribed through the day. The night time hours are the most difficult. The obvious solution would be to fill the eye with Lacrilube. This unfortunately leaves one with a blurry vision and some do not care for it.
Alternate therapy is complex.
Some tape the eyelid shut. This is fine when it works, but, per chance the eye opens, and the tape or gauze comes in contact with the cornea, corneal abrasions may ensue. Other treatments involve creating moisture chambers. If a complete paralysis persists at 3 months, the patient did not have Bell's Palsy. An ENT referral and an evaluation for other causes, is now required.