A federal lawsuit accuses San Antonio-based Visionworks of America Inc. and its chain of more than 700 optical shops of failing to notify 40,000 customers after their data was exposed in a cyberattack. The suit, filed Dec. 23 in U.S. District Court in San Antonio, alleges Visionworks suffered a data breach on Oct. 10 but didn't begin notifying customers until last month. The plaintiff, an Arizona customer, is seeking class-action status for the legal claim, which also accuses the company of failing to adequately protect its computer systems. Visionworks officials were unavailable Thursday for comment on the lawsuit.