Will sinus and allergies cause your eyes to play tricks on u like a little blurry vision in one eye?

Yes. If your allergies symptoms are like mine,you probably get fluid in your inner ear that throws off your equallibrium and gunky stuff in your eyes. Both things mess up clear vision.

YES! Allergies can sometimes cause blurry vision in one or both eyes. I was told that I have "dry eye syndrome" cause by my allergies. My left eye also often twitches and at times it also feels like I am loosing focus and I have to blink a few times to restore it.

Also the constant use of antihistamines or decongestants, and even wearing contact lenses can cause similar effects.

Speak to your doctor about the symptoms if possible, as it might be a sign of some other eye problem.

If you can't try over the counter "tear" drops and an antihistamine (if not already taking one). If this doesn't help go try the doctor he may be able to give you corticosteroid drops that will help.
I had roughly the same problems, my eyes going blurry, not being able to read farther away, feeling my eyes twitch, and just feeling weird, not hurting, just ..., Advice doctor gave me. Now a couple of "tear" drops in right eye and a couple of corticosteroid drops in the left eye clears things up.
Yeah, I get that. Your eyes get so watery and swollen and such- it's natural to get blurry vision and stuff like that because your eyes are reacting to allergies.