Essilor of America, the U.S. subsidiary of Essilor International, has acquired a majority stake in Sutherlin Optical Company, a Missouri-based prescription laboratory and distributor of the Varilux brand that has annual revenues of $13 million. In addition, Essilor of America has bought the assets of Dispensers Optical Service Corporation's safety prescription division. Dispenser Optical Service is based in Kentucky and has annual revenues of $5 million.