first of all, lenses don't 'stretch' they are cut out of what we call a 'blanc' which is a very large lens. your lenses for your glasses are cut from the centre of the 'blanc' and glazed to fit the frame. With high prescriptions it is harder for them to stay in the frame because they are more curved and a lot thicker. That is why you should pay to have them thinned down. When they are thinned down this doesn't meen they are cut 'smaller', it means the 'blanc' is a lot 'flatter' and 'denser' so that the prescription is still correct, but the appearance is much thinner and cosmetically they look a lot nicer. It's not specsavers fault that you have ### eye site and have to pay for high index lenses (High index means thinner lenses incase you don't understand optics terms'
as for the 'smear' thing? it sounds like the ultraclear treatment broke down on your lens which is very unfortunate and hardly ever happens so just unlucky i guess. But this could happen anywhere, vision express, optical express. it sometimes just happens and it can't really be explained why but Specsavers in my experience put this right by re-ordering your lenses asap. what more can you ask? High prescription lenses do take longer to order in than just standard lenses.
so basically, you're going crazy because the ultraclear coating broke down? they got the lens right within ten minutes of it coming out. Don't you think your over-reacting. Basic-Human error does occur in businesses to everyone! bet you don't get everything right first time every day at your work hmm??
I LOVE SPECSAVERS!!!