Your eyesight is a precious commodity.

If you are looking to keep your eyes healthy, then there are certain things that you need to do to ensure that. Here are a few ways you can do so.

Eat healthy foods, especially ones that are colored orange. They are rich in vitamin A that is essential for good eyesight.
Stop staring at the computer for too long
Give your eyes some rest
Sleep well

There are many more ways that you can keep your eyes healthy. Rather than go into the specifics, I would like to draw your attention to an article Dr Vivek Baliga published on how to keep your eyes healthy.

Take a look at it when you get a chance.