computer glasses are special glasses prescribed to lessen the symptoms associated with computer vision syndrome (CVS). CVS describes a group of symptoms caused by prolonged computer use. Symptoms appear because the eyes and brain react differently to words on a computer screen than they do to printed text. Symptoms often include eyestrain, dry eyes, headaches and blurred vision. Many people try to compensate for these vision problems by leaning forward or by looking down to see through the bottom portion of their glasses, often resulting in back and shoulder pain. Source:http://vision.about.com/od/eyeglasses/f/Computer_Glasses.htm
If you do need and it does work, then you can use eye drops when you work on a computer. You can try artificial tears, like Systane, which can keep your eyes in moisture for a longer time so that your eye strain can be relieved.
I also have to work in front of the computer most of the day,but I don't want to use any eye drop.You will be more depend on it if you use it often.For computer user,you can get a pair of computer glasses and have your eyes rest regularly.