What are some good tricks to help your eyes after, and during, a long time online and reading?

Every twenty minutes stare at an object twenty feet away for twenty seconds.

Sleeeeeep. And take a day to go outside and not look at any screens.

Periodically look up and outside so you eyes have a chance to focus at a distance. Get up and move away from the screen.
Eye strain is a sign you are staring at something too much. Move.

There’s a free program you can download called FLUX. It turns your screen orange when it gets dark to ease the strain on your eyes when using your pc at night.

Take a nap. Go out and/or stare on a green plant at least a lil far from you for at least 10 mins. And stay away from screens for at least 30mins. or an hour.