Computer use may tire the eye, especially if done for long periods of time, but will not damage the eye. My suggestions would be to see an Eye MD ophthalmologist to see if your eyes are healthy and if you need glasses.
Also when using the computer about every 15 minutes look away from the screen and out the window or down the hall and refocus on a distant object. Then blink you eyelids hard 5-6 times. This rests/stretches the focus muscle of the eye and moisturizes the cornea.
Thank you JCH for your support. In my country, there is no knowledgable Eye MD ophthalmologist and that why I registered to you website and I taught I will get good solutions from you. If u can please feed me with another alternative solution on getting Eye MD ophthalmologist...Thank you.
Perhaps you have access to an optometrist? A non-physician, limited scope eye care practitioner? Optometrists have a OD degree after their name.
If neither are available the perhaps see a MD physician to be sure you are in good health as problems like diabetes, high blood pressure can effect vision.
If you are middle age or older (40 years of age or older) then trying to fine a pair of "reading glasses" such as +1.00 might be helpful if other alternatives are not open to you.