BRUSSELS - EU antitrust regulators on Tuesday extended their investigation into Ray-Ban maker EssilorLuxottica's <ESLX.PA> 7.2 billion-euro ($7.8 billion) bid for Dutch opticians group GrandVision <GVNV.AS> by two weeks to July 6, according to an EU filing.

The European Commission launched a full-scale investigation on Feb. 6 on worries that the deal could push up prices or reduce choice for consumers.

The deal has sparked concerns among retailers and rival lens makers, sources have told Reuters. EssilorLuxottica's eyewear and retail brands include Oakley, Sunglass Hut and Spectacle Hut.