The ophthalmologist is not usually much help but a neuro-ophthalmologist or preferably a behavioral optometrist would be worth the effort.

If you do have sleep apnea, it can make PCS miserable. It is also know to be a cause of Mild Cognitive Impairment. It can slowly take away cognitive functioning.

I get my best sleep in a recliner where I have less chance of apnea episodes. My dreams are better. I wake refreshed.

My breathing is so much better after having my deviated septum repaired along with a reducing in size of the turbinates. The ENT thinks I shattered my septum during my bike accident. I used to get bloody noses during the winter. No more....

If the brain is not getting good oxygen during sleep, everything works poorly.

Do you take bouts with sleepiness during the day ?