By Mauro Orru

EssilorLuxottica SA said late Wednesday that it is joining forces with Facebook Inc. for the development of smart glasses.

The Franco-Italian optical giant didn't disclose financial details, but said the partnership would be a multi-year collaboration effort.

The announcement came from Facebook Chief Executive Mark Zuckerberg at the annual Facebook Connect conference in California.

EssilorLuxottica said the first product would carry the Ray-Ban brand and is expected to launch in 2021.

Write to Mauro Orru at mauro.orru@wsj.com; @MauroOrru94