My glasses weren’t correct, and my eyes had difficulty focusing. I went back to tell them. They checked the glasses against their prescription, and told me they were correct. I said my left eye struggled to focus, and their answer was to say if I could see with both eyes at once, then that was ok! Cost me over £400 for lenses only. Go forward a year, and got my eyes checked at Asda, and given new glasses. Had to go back as I felt eye strain after 2 weeks. Was thoroughly checked again and previous glasses reviewed, to be told the alignment on the vision express glasses was totally out… worst she has seen, and my eyes had been permanently altered/ damaged as a result.