Eye problem?!

Eye problem?

Lately my vision hasnt been the best. Ican still see but Its harder to focus to on things like when your tired and watching tv at night. Could this be serious like cancer in the eyes or brain. im worrying myself bigtime. im 15 so i will driving soon and i dont know what i should do. got my own computer a few months ago and sit on it all the time. i also watch many hours of t.v. each night. my ma always said i would need glasses if i sit too close to the t.v. is that what i need? i kind of have a dizzy feeling sometimes too

2 months ago
my last exam was 2 1/2 years ago.i had them dialated and everything. i had this wierd lump under my eyelid and he gave some drops and told me to put a hot washcloth on it every day. it went away and he said if it ever comes back just do that which it hasnt.

uhh...yea. it isn't very good to sit too close to anything. one question, do you have any other lights on when you are on the computer and watching TV? if your answer is no, well....start. i do not think it is cancer, just bad habits, and GET GLASSES if you are going to drive!!!! don't watch as much TV and you should be fine with glasses.