How can you tell you have part of a contact lens in your eye, and how can you get it out without further irritation?

I am not usually a CL user—obviously. But when I lost my glasses and had to drive I found myself using Ciba Dailies, which are basically weightless and very flimsy. I used them when I had to for 7 days, while I waited for new glasses, and I saw something shiny fall down my cheek and thought I’d dropped the last CL I took out of one eye.

That eye watered (but worked fine with the new scrip) even after I got my new glasses until, 2 1/2 days later, I felt something under that eyelid and rubbed it around until it came out: a torn 1/3 of a contact.

Is there anything anyone can use to tell if you have a contact lens stuck to the back of your eyeball or to the inside of an eyelid? (How do cops tell if you’re wearing them?)

And how can you flush it out?