My youngest brother is red/green colour blind...so what did he do for his first proper job...tomato cultivation!*
*he can still tell how ripe a tomato is just by touch!
Following on from the vision test theme earlier in this thread:
If you see two numbers but they're both the same and you have to squint to read them, you have synesthesia, colorblindness, diplopia, and myopia.
Back on the topic of kerning:
Link: Subtle Google Easter Egg