Give them a ring? For BL, my optician wrote to the office, I went to an optician and took the test (they had the form). Sent it off with my licence, and got a new shiny one a week later. Without the requirement to wear glasses.
After a cataract operation I had to get my DL reissued without the glasses restriction. Took the paperwork (old licence and my ophthalmologist's certificate) to the Bureau des Autos in Nyon and the following day had a new DL with a payment slip for 40 CHF.