There's more to this problem than tired eyes.
You may not realize it, but when you stare at a computer screen all day, you blink much less than normal.
In fact, research shows that the average person blinks 60% less than usual. Since blinking is what "lubes" the eyeball, this is why your eyes dry out, get red, irritated, and itchy.
You can get expensive dry eye medication, but, chances are, if you have no underlying eye condition, a simple solution may work for you.
Tilt your compute screen down a little. Your eyes shift downward to see it. As this happens, your eyelid will cover more of your eyeball.
Without making a conscious effort, you will automatically blink more often, keeping your eyes moist and more comfortable.
Try this simple fix and see if your eyes feel better. If not, make an appointment with your eye doctor.