From "The Latch-Key Solution" by Larisa Naples

The homeless nut looked at me with genuine concern.  He placed a gentle, well-manicured hand on my shoulder.

“You know, I really think you should have a glass of wine — or three — before I answer that.  It’s not something a man should see sober.  Why don’t you join me in my cardboard condominium?  I still have that bottle of chardonnay.”

“You are really beginning to irritate me.”

“All right.  But don’t say I didn’t warn you.  Here.”  He dug into his trouser pocket and handed me a lady’s compact.

“I don’t wear make-up.”

“Take it!” he commanded.  “I want you to take a good long look at your eyes.”

“Why?” I said, suddenly nervous.

The nut looked me straight in the eye.  “I think you already know the answer to that.  Now, look!”

I open the compact and slowly — ever so slowly — I brought the mirror up to my eyes.

“Aaack!”  The mirror shattered on the floor.  “What’s wrong with my eyes!  My pupils are…”

“Square?” completed the nut, “With some kind of… something crawling around inside, just behind your cornea?”

I stared at him in disbelief.  “But… how?”