The very basics are to sit as far as you can from the monitor and take eye breaks (periods looking off a decent distance away with soft focus like 20m+ or so).
If the distance you can sit from the screen is limited by visual acuity etc then get glasses and consider blue filter lenses (not so important truth be told as you can always warm the colour of your screen).
Make your eyes life easier use large scale text on the screen.
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Need to know what you've tried.
The very basics are to sit as far as you can from the monitor and take eye breaks (periods looking off a decent distance away with soft focus like 20m+ or so).
If the distance you can sit from the screen is limited by visual acuity etc then get glasses and consider blue filter lenses (not so important truth be told as you can always warm the colour of your screen).
Make your eyes life easier use large scale text on the screen.