What is "specsavers"

Specsavers Optical Group Ltd is a British optical retail chain, operating globally, which offers optician services, along with eyeglasses, contact lenses and hearing aids. In 2012 it had the largest single market share of the four major opticians with 42% of the UK market. The company had a total turnover of £1.5 billion in 2010/2011 and £1.7 billion in 2012, with 1,648 branches in the United Kingdom, Guernsey, Jersey, Ireland, Norway, Sweden, Finland, Denmark, the Netherlands, Spain, Australia, and New Zealand.