Where can i get cheap and useful ways to protect my eyesight?

What do you want to protect your eyes from? Eyestrain?

Here are some tips from the Mayo Clinic:
* Adjust your monitor. Position your monitor directly in front of you about 20 to 28 inches (51 to 71 centimeters) from your eyes. Many people find that putting the screen at arm’s length is about right. If you need to get close to read small type, consider increasing the font size. Keep the top of your screen at eye level or below so that you look down slightly at your work. And if you wear bifocals, you may have a tendency to tilt your head backward so that you can see through the lower portion of your glasses. To adjust for this, consider lowering your monitor a few inches or buying glasses designed for computer work.
* Check the lighting and reduce glare. Bright lighting and too much glare can make it difficult to see objects on your screen and strain your eyes. To check glare, sit at your computer with the monitor off. This allows you to see the reflected light and images. Note any intense glare. The worst problems are generally from sources above or behind you, including fluorescent lighting and sunlight.
* Adjust your monitor. If possible, place your monitor so that the brightest light sources are off to the side, at a right angle to your monitor. Consider turning off some or all of the overhead lights. If you need light for writing or reading, use an adjustable desk lamp. Close blinds and shades and avoid placing your monitor directly in front of a window or white wall. Use a glare-reducing screen to minimize glare from overhead lighting. Finally, adjust the contrast and brightness on the monitor to a level that’s comfortable for you, making sure the letters on the screen are easy to read.
* Keep your monitor clean. Wipe the dust from your computer screen regularly. Dust on the screen cuts down on contrast and may contribute to glare and reflection problems.
* Position your keyboard properly. Place your keyboard directly in front of your monitor. If you place it at an angle or to the side, your eyes have to focus at different distances from the screen, a tiring activity.
* Keep reference materials nearby. Place reading and reference material on a document holder beside your monitor and at the same level, angle and distance from your eyes as the monitor is from your eyes. This way your eyes aren’t constantly readjusting.

using computer will not affect your eyesight greatly, i think.
my experience is that proper light source is very important.
do not make the surrounding to dark or to bright.
what kills your eyesight is insufficient light when reading.> <

Wear sunglasses. UV rays help form cataract, and proper sunglasses help prevent this.

Sunglasses also help prevent macular degeneration.

@faye

Do you know why sunglasses help to prevent macular degeneration ?

Is it only outside or indoors as well?

I’ve never heard about that and would be very interested in any additional info regarding this. Thanks.

Using computer for a relatively long time can really make your eyes hurt. Have you ever heard of CVS (Computer Vision Syndrome)? The most common symptoms associated with CVS are eyestrain, headaches, blurred vision, dry eyes, neck and shoulder pain. One more thing you may be not noticed: with computer use, your eyes can be damaged by the blue light and glare emitted from the screen. And you still take the high risk of getting macular degeneration by blue light.

Here I want to answer @faye, sunglasses can not help to prevent eye disease. It really works to reduce glare when you are outside, but it has no affect on blocking blue light. If you really want a pair of glasses to work for your eye health, you can consider a specially designed one to filter blue light and UV. If you want to know more, here you can get to know how computer eyewear filters blue light: http://www.youtube.com/watch?feature=player_embedded&v=nmUebEu3GzE