What is an Ishihara Test used for?

More Questions:

Which UK politician was given the nickname Tarzan?

What surname for John in "The Importance of Being Earnest" did Oscar Wilde take from the seaside town he vacationed at?

Which US state capital city lies closest to Philadelphia?

In which US city will you find Louis Armstrong International Airport?

In which city is the Prado art gallery located?

What is the most populous bird in the world?

Bubble wrap was invented accidentally by researchers who were trying to develop a new type of what?

Limnology is the study of what?

What is the common name for the fruit Citrus grandis?

Which James Bond actor also appeared in the movie "Lara Croft: Tomb Raider"?

In which movie does Audrey Hepburn play a character named Holly Golightly?

What lovestruck Warner Brothers cartoon character often chased a black cat named Penelope?

Who was the first U.S. billionaire?

What year did Adolf Hitler rise to power in Germany?

Which computer scientist was largely responsible for the design of "FLOW-MATIC", the first English-like data processing language?