TWO RIDDLES

1. Why did the shy optometrist have to change careers?

2. What can you say about the following words?

ABSENCE, HOLE, SPACE, VACUUM

Answers:

1. He couldn't look people in the eye. 
2. They have nothing in common.

Credit #2:
NY Times Crossword
September 13, 2006
Lee Glickstein and Nancy Salomon