Do you take any precaution for caring your eyes, while working for long hours in front of computer, if yes, how?

Some tips on preventing such problems.
Adjust the Position of Your Monitor The biggest cause of eye problems is placing the monitor too high, said Anshel.
Our eyes work better and focus more accurately when they’re looking slightly downward rather than straight ahead.
You should place the monitor so that if you look straight ahead, you’re peering just over the top of the monitor, then you should slightly angle up the monitor.
Along with fatiguing your eyes, reading a computer screen while looking straight ahead can also dry them out, since your lids will have to be more widely open.
If you wear contact lenses, the eye dryness will become more exasperated.
People blink about one-third the normal rate when using a computer, said Anshel, because they’re looking up and concentrating, which also contributes to dry eyes.
Even though blinking is largely reflexive, try to keep aware of the need for it.
Your monitor should also be no closer than arm’s length from your eyes.
Pay Attention to Surrounding Lighting To avoid glare or shadows caused by nearby windows, and the resulting eyestrain, don’t compute while facing an unshaded window or with an unshaded window directly behind you.
Shades, blinds, or curtains can help.
The best window position is to the side of your computer.
If reflections are still a problem, an anti-glare screen placed over your monitor can help.
When computing, if you typically view dark text on a light background, the room lights should be brighter than if you typically view light text on a dark background.
If you can’t adjust the lighting, consider wearing a visor to shield your eyes from it.
Light text on a dark background can be easier on your eyes.
Take Eye Breaks Our eyes aren’t designed to see at a close distance for hours at a time without interruption, said Anshel.
If you keep your eyes focused on one particular point for an extended time, the lenses of the eyes will get stuck at that focal point, which, among other things, can cause squinting and eye-muscle fatigue as well as problems reading street signs at night.
He recommends the “20/20/20 rule.” Take a20-second break every20 minutes, focusing your eyes on points at least20 feet from your computer screen.
Keep your eyes moving while looking at objects at various distances.
Wear the Right Glasses If you normally wear glasses or contact lenses and are older than about45, you may need special vision correction for computer work.
Computer screens are neither at a close distance typical of reading nor a far distance typical of driving; rather they are at an intermediate distance.
Regular bifocal glasses can cause problems when computing, as can glasses with progressive lenses because the intermediate zone is too narrow.
If you’re nearsighted, a work-around is using older glasses with a weaker prescription.
A better solution is to get glasses that are specifically focused for the intermediate distance of computer screens.

you've to repose your eyes10 minutes at least every2 hours, furthermore you can take a glasses anti-reflective.

Wash your eyes with fresh water in every1hr, Do some eye exercise like keeping focus on your near by thing then on at far away object ,repetition10-15 times in every1 hr....
Care your eyes ,bcoz that is your most efficient & Precious working TOOL...

1-the most common precaution is to take rest every1 hour to refresh you eyes .

2- to set in good position not to be near from the screen.
3-wash you eyes every rest (1 hour ) with water.

استراحه العیون کل15 دقیقه-تنطیم شده النور ما یعادل نور المحیط-

Use computer glasses.
Computer glasses are prescription glasses that are designed to wear when doing computer work.
They allow you to focus your eyes on a computer screen, which is farther away than reading material is normally held.

Every45 mins or so i tend to go near the window and look at greenery, plants etc for1 or2 mins.
:) .
Look at far distance objects.
Sit up tall and relaxing position