Sounds more like an ocular migraine, but could be meds or other things.

I talked to Tom about this, but since last summer, I get a blur in my right eye, especially when I'm hot. I had a thorough exam with dilation and the works, and they couldn't find anything wrong other than signs of an allergy in my eye. They recommended over the counter eye drops and I got some Zyrtec which helps somewhat.

Keep one thing in mind: the ophthalmologist he saw referred him to another guy because he didn't know what it was.