I found a large numbered landline phone for my mom with Alzheimer's. Her eyesight is bad and she can no longer use a portable phone. Wondering which would be more helpful for her to see.... a black phone with large white numbers or a white phone with large black numbers.
I remember back when my aging parents bought a new microwave, the old one was white with black letters and Mom had no problems. Their new microwave was black with white letters and Mom had to use a small flashlight in order to see the letters. That great sale on that microwave didn't really turn out to be so great :P