dry eye disease
"I used Xiidra for about 5 weeks. Half the time I only used it once a day.  I experienced the blurry vision which for me lasts about 20 minutes.  I also had the bad taste - bitter is more like it.  That lasts about 10 minutes.
I hoped it would help but I have not experienced any change in my dry eyes.
So, if you are the are helping you in a dramatic way, then you are one of the lucky ones.  It seems to be hit or miss depending on who knows what."