tony,
Would get a second opinion from another optician.
Mrs Ropey had deteriorating sight for years and finally put vanity behind her and got specs. Improved her sight no end but still not 20/20 (or 6/6 as we are now in 'new money' in the UK). Sight continued to get worse and glasses (and later, contacts) were not as good as they used to be. Several times she was told the prescription was fine and nothing more could be done.
After a year or two she went to a different optician who diagnosed astigmatism (sp?) and different contacts for the problem- her eyesight (corrected) now is at least as good as mine (better than 6/6).
Moral - just because they are wearing a white coat don't automatically assume they are infallible
