How Should Color Blindness On Seeing Distant Objects Be Treated?

My six year old daughter told me that today every appears to be black and white (she said, Everything looks like the beginning of The Wizard of Oz ). I pointed out specific signs (one red with white writing for instance) and she said everything was grey and white, with the trees and grass being nearly black. When she was within a couple feet of something she could tell me the color correctly, but as she moved further away from it, it would appear grey to her again. I am waiting to hear back from her optometrist, but we live in a small town with limited medical expertise so I wanted to explore other options as well.