Get eyes tested
The best thing to do is to get your eyes tested. This way you can get updates on whether you have any eye issues, or if it is actually the computer that is causing all the eye related problems that you seem to be suffering from.
Reduce glare and brightness
You need to cut down on the glare that your monitor gives off. Position it in a manner so that there isn’t a lot of reflected light going straight into your eyes off the monitor.
At the same time, in order to make sure that this has an even bigger impact, cut down on the brightness levels of the monitor. Since doing this will put less of a strain on your eyes.
Keep room well lit
The room where you are using your computer should be well lit. Staring at a monitor in the dark can lead to some very negative effects on your eyes, and you need to avoid this from happening.
Take breaks and use protector screens
The last thing you can do is to use protector screens, that reduce the impact of the screen on your eyes.
Apart from this, the best and most proven way to prevent eye strains is to take breaks when using the computer. Every hour, try and take fifteen minutes away from any monitor, so that your eyes can get a decent break and can get refreshed in the process as well.
This is bound to help your eyes out quite a bit.