My 9 year old son, who has been diagnosed with pediatric MS, has blurred vision for over 48 hours. A couple of times his eyesight returned back to normal but then it got blurry again. The MS specialized opthamologist said that he did not see any inflammation. We did an MRI and it also came back clear. What else could be going on?
DED can be uncomfortable (feel scratchy or like something is in the eye) - but it isn’t always. I told my ophthalmologist I had visual fluctuations (blurriness and ghosted images) for years. He'd ask if I had any problem with dry eye. I said no because I didn't have to use moisture drops very often. He didn’t actually look for it himself. Last year I went to a highly recommended optometrist. He used a simple dye test to determine my tear layer was evaporating away too fast. He started me on Restasis and my vision was much more stabile within weeks.
It might be worth checking out. Maybe a high quality OTC wetting drop would even help some. I’m including a link you can copy and paste for a better explanation of DED.
http://www.eyeworld.org/article.php?sid=5009