why would you want to . Presumably you have ordered glasses that change when you go outside. This will be integral and not removable by you, or the shop come to that. If you want without this you will have to have a new pair of glasses made young raymond.
No you can't - the tinit is in the glass, it doesn't come off, the shop can't do it either. You would have to order a new pair with plain glass. Why would you want to?
Glazing labs use a de-tint bath which is a heater with a bleaching/neutralizing liquid to try to remove the tint from lenses. This is more difficult the older the lenses. Unable to do if the lenses have certain coatings too.
You cannot do this at home but may cost about £20 in some places.
thank you all for your great answers,the reason was they made a mistake and put the tint on to much,so they gave me these as gratis allso gave me a new pair. cheers yukka.