Latest News Essilor Acquires Team Effort Optical Lab, Merges It With Duffens Lab By Staff Friday, July 7, 2017 12:24 AM OKLAHOMA CITY, Okla.—Essilor has acquired Team Effort Optical, a full-service independent optical laboratory based here. The terms of the transaction were not announced. Essilor will merge Team Effort with its Duffens Lab in Oklahoma City, an Essilor spokesperson told VMail. The combined company will operate out of Team Effort’s location under the name Team Duffens Lab. No layoffs have resulted from the merger, the spokesperson said.Team Effort Optical was founded in 1984 by Mike and Denise Munzuris. Mike Munzuris, a 50-year optical industry veteran, will remain with the company in a customer advocacy role. His son, Derek, who has been with the lab since 1989, will serve as production manager. Ray Osborn has been named general manager.