After an episode of viral fever and nausia , I'm left with a hazy eyesight just in my rigt eye , its like what I see under a grey cloud,and also I have pain in my right eye , spcly when I move my eyes towards the side I feel pain,my left eye is perfectly fine,what's wrong ?

You need to visit an eye doctor immediately. This is not something that we can diagnose online, unfortunately. We can all sit here and speculate, but that won't help you a bit. Please see an Optometrist/Opthalmologist.