One tips to keep eye health

I still remember, one time my father once said, one way to maintain eye health is to look green green trees in the morning.

And sure enough, I've read an article about it. Mentioned, one of the tips for healthy eyes is to see the natural green color. The color is of course from the trees as my father said.

If you want to know the truth, try browsing articles about eye health on the internet. What does my father say is true?

My father is a farmer