Stu,
Shortly after diagnosis my glasses proved to be rubbish for my close vision and for about 3 weeks I was wondering around without glasses - but my lens prescription has changed since I got my blood glucose levels under control.
While things are still changing though it might be advisable to hold fire until things settle down, once you are happy with your BG control then I would suggest returning to your optician for an eye test and prescription.
Regards, Tubs.