If you go to Asda mariner make sure its one that someone can recommend to you. My hubby has worn glasses for years, fancied lenses and went to Asda because of the convenience of evening appts and the special offers. There followed a catalogue of mistakes including him being given the wrong prescription altogether twice to try out around the store, his eye test being repeated twice by different opticians because they said it hadnt been complete the first time and finally after him persevering for a few months with the new lenses, struggling with the vision they gave him and them never really being comfortable I made him go back to his original optician to find he should never have been prescribed lenses in the first place for several reasons. Not suggesting all Asdas are the same, just go by recommendation like most things.