I started experiencing blurry vision/double vision several years ago. I have had several eye exams, an optic nerve test, blood sugar test, blood pressure test, etc. No one seems to know why this keeps occurring. I do not have pre-diabetes or diabetes, there is nothing wrong with my optic nerve, my long distance prescription has not changed significantly over the last 20 years, my blood pressure is within the normal range, I do not have macular degeneration or any other eye disease. I thought for awhile that it might be my blood pressure, but have it checked regularly and it is always normal. It doesn't occur with migraines, it just comes on whenever. I can wake up with perfectly clear vision and it can change in a matter of an hour. It is not caused by eyestrain (although I do work on computers and have for over 30+ years). Eyedrops do not help and when I wear my prescription glasses for distance, the blurry vision is still in effect.
If anyone on this planet has a clue, please enlighten me. It is becoming very difficult to work and read.