All of a sudden I have what appears to be a cloudy film over my left eye. I have no pain, itching or burning. What could it be?

Poor tear film. Easy remedy! If light film, then Warm compresses in the morning, and use lubricating drops to clear it up. But if it's a dark film or cloud, and you can't see out, then it could be a medical eye emergency, and you need to go to the ER or Urgent Care to see an eye doctor to make sure it's not a retinal detachment, or bleed. .