FREMONT (CBS SF) — A pair of shoplifters were caught on surveillance video stealing several pairs of high-end eyeglasses from a Fremont optometry store.

The suspects entered the Fremont Optometric Group, remained in the store about 15 minutes, and left. That’s when an employee noticed 10 pairs of glasses worth about $400 apiece were gone.

WATCH: Surveillance video

“They were being really nice to all the patients,” said office manager Duy Phamn. “They just came in, looked around and while my employees were busy took the glasses and pocketed.”

Phamn said the couple was caught on surveillance video stealing eyeglasses from another optometry store San Jose a few months ago.