Double Vision

nope

I'm having an ophthalmology MCQ paper today. Sadly I can't really tell what is your problem because clearly I'm not a good student, still browsing the internet 6 hour before an exam. Might be just tired eye.

Maybe you are straining your eyes too much. I play a lot like 3+ hrs a day (more since school is almost out) but I don't get any problems. Then again I have a lot of time where I don't have anything electronic (sports)

How far is your monitor from you? Also get some drops for your eyes. It's not VISION that's causing your problem it's in the eye itself. I know because I have similar issue, my eyes are soooooo fuckin' dry that I'm forced to use drops (I like to refer to them as fake tears :D) if I spend too much time staring at monitor