iOS Universal Healthcare & Fitness
Color-blindness is the inability to distinguish the differences between certain colors. This condition results from an absence of color-sensitive pigment in the cone cells of the retina, the nerve layer at the back of the eye.
A person with color-blindness has trouble seeing red, green, blue, or mixtures of these colors. The most common type is red-green color-blindness, where red and green are seen as the same color.
Sorry,I made a big mistake in last version.Few user can't open the app.I'm really sorry.
I've fixed the bug and now it's perfect.
It's still a clean and useful test tool. Hope you enjoy it.