French retailer giant Carrefour has said it has reached a deal to sell its optical stores in France and Spain to French optician Alain Afflelou for an undisclosed sum.

Carrefour's sale of the 68 stores in France and a further 68 in Spain is believed to be part of a strategy to focus on its core business.

Although not providing financial details of the deal, Carrefour said the French stores had revenues of €56m (US$64.8m), while the Spanish stores had sales of €20m, reported Reuters.

British private equity fund Apax Partners controls a 24% stake in Afflelou.