Exercise to improve your eye sight

Hey... Do you got eye sight problem??
Some exercise which can help to improve your eyesight are here...
• Warm your eyes. Rub your palms together to create heat, and then place them against your eyes for five seconds. Repeat this three times.
• Roll your eyes. Start by looking up and then slowly circle10 times clockwise and 10 times counterclockwise.
• Focus. Hold a pen at arm's length, focus your eyes on it, and slowly bring the pen closer until it's about six inches away from your nose. Then slowly move it back, keeping your eyes focused on the pen, 10 times in all.
• Massage your temples. Using your thumb knuckles, massage your temples in small circles, 20 times in one direction and 20 in the other. Repeat the same actions above the mid-point of the eyebrows at the forehead, then below the eyes on both sides of the bridge of the nose.
• Take a mini-nap. Put your head back, close your eyes, and relax for three minutes.

hmm... nice tips but i doubt for first tip because i thik cold is better for eyes not warm. i already heard these 4 tips but never use this, anyway i think cold is better what do you think about that..??