Originally Posted by
MADPhil
I made the mistake at ORD of inserting my passport before getting posed for the photo. As a result it was taken while I had my glasses on and was looking down and didn't match so I got the X. I was sent to stand by a pillar with a "stand here" sign on but was ignored until I asked and was told to stand between the pillar and the CBP lane and go in the next time the officer who had been studiously ignoring me was free. Apart from that it was quick and painless!
I don't believe GE uses the photo for comparison to its records. They put that on the receipt so the officer can confirm you didn't pass the slip to someone else. So whether you have glasses on or off is irrelevant - just put them in the same place when you reach the exit.
(And, yeah, the photos are silly - the top of my head was cut off and only my daughter's scalp showed when we used GE this past weekend - oh how we laughed about it while waiting behind the non-GE line cutters at the customs check).