I've had 'lens exchange' with Optical Express , due to the fact that i was considered 'unsuitable' for laser surgery ..... however whilst i can generally see better than i could before , to be honest i don't think it has quite been the success that i thought it would , even though the following check-ups reckon i've now got 20/20 vision ...... and it was very expensive too.
Lens exchange requires taking out the 'worn' natural lenses in your eyes , and replacing them with new ones ..... a kind of cateract operation.
___________________________________________________________
The missus , on the other hand , uses contact lenses from Specsavers at about £24 per month for 30 pairs (daily disposable soft lenses)