As a terribly nearsighted and astigmatic child, I grew up with gentle rejoinders from my parents and doctors to rest my frequently strained eyes by looking at green things.
Fortunately, I grew up in a neighborhood that had its fair share of grassy vacant lots (presently no longer the case in said neighborhood). To this day, I associate the sight of green grass with all that’s calm, soothing and reinvigorating. (It feels good underfoot too.)
We should all have our little patch of grass. Literally.