I went to Specsavers after my husband pressured me to go to them to save money - The glasses they made for me were not done to my prescription, and I was a danger on the roads as I was clipping the curbs - there was no 'prism' in the glasses they made for me and my brain was ignoring what my left eye saw. They did a retina scan and said nothing was wrong.
I went back to my old opticians and got the right glasses but since being diagnosed I have noticed my eyes had changed, and so have had an eye test, I need three different pairs of glasses for driving, computer use and reading. I have also had a retina scan and - guess what?
I would not recommend Specsavers for even the most basic optical work.