No. Doing eye exercises won't strengthen your vision. It can only make your eyes relax to make you relieve from eye strain. If you don't want to wear glasses and contacts, you can choose to have lasik surgery to have your vision corrected.
If your prescription is low, you can stop wearing glasses and try other ways to maintain your eyesight. Firstly, get a healthy diet. For examole, eat more food rich in vitamins. Secondly, don't play computer or watch TV too much. When you play computer for a long time, you should take regular breaks to avoid eye strain. Thirdly, don't read or write in dim light. Finally, do eye exercises regularly every day to relax your eyes and strengthen eye muscles.
Eye exercises can only help relax your eye, and prevent eye strain. They can't help improve vision. Any form of eye exercise is useless if you want to improve vision. If you don't want to wear contact lenses, the only choice is to have lasik surgery.