DVLA changed the rules in 2013 so that, so long as your vision with glasses is okay, you don’t have to pass any particular test without your glasses or contact lenses. However, for no reason that we can see, DVLA still insist that the doctor tests your eyesight without your glasses or contact lenses. It doesn’t matter what the result says, but if the measurement isn’t done, DVLA will send the form back to you. Strange, we know – but there it is!
If you are coming for a taxi medical you don’t need to have your eyes tested without your glasses, so long as your vision is okay with your glasses on.