Great question. As always the answer to this question depends on your age, duration of symptoms, and of course your eye exam to determine the etiology of your complaint. As a cornea specialist, this is a common complaint in my practice. There is a condition called Fuchs’ Dystrophy, which is a condition that leads to endothelial cell loss (from the cornea) at an early age. The cornea needs to remain clear in order for you to have clear vision, as the cornea accounts for 2/3 of the refractive power of the eye. The endothelial cells serve to pump the fluid out of your cornea all day/night long keeping it clear and functioning well. As you get older and lose these cells, eventually you cross a threshold where the cornea thickens at night while the eyelids are closed (and you don’t have that added benefit of evaporation of fluid off of the corneal surface). Well, this is why patients wake up in the morning with blurry vision that gets better as the morning progresses. There are over-the-counter drops you can use (Muro 128) in the morning and ointment before bedtime. Eventually, when the vision is cloudy for several hours after starting your day, we can do partial cornea transplants (DMEK/DSEK) to restore your sight.
With your complaints, I would definitely recommend getting checked out by an ophthalmologist.
Lee Katzman, MD