I'd say it was almost equally dangerous for person with that high level of visual impairment to use any stairs where each stair is a single uniform color. In y

I'd say it was almost equally dangerous for person with that high level of visual impairment to use any stairs where each stair is a single uniform color. In your example it might be difficult for such a person to identify the location of the stairs, but still very dangerous once they found them and began climbing. In my example-- say the stairs were a uniform red-- once the stairs were found it would still be equally dangerous to climb them, little better than going up blindfolded as you couldn't distinguish one stair from another. A person with that impairment should probably want some sort of occupational therapy to use a guide cane or other method to safely perform tasks like that without relying clear contrasting colors.