Talk to PALS in your hospital they have a desk in ALL hospital and are excellent representing the patient / person at least you know they will help it is like having a legal representative. Ring your hospital and ask to speak Patient Advise Liaison Service
Hope this helps
The problem with things like this unless you actually experience the issues you get complacent when filling forms in without realising what the outcome could be should you find that you ticked the wrong [emoji403]
As I stated I am note trying to advise anyone what to do but only my experience and people who used to fill in the self certified medical certified as appose to the new medical form will understand with regards the eyesight and the 01 code it is not just a case of whether you can read a number...
I have just renewed my driving licence in which I had to fill in a medical form about my diabetes. When I renewed my licence last time you self certified your medical certificate as being correct. When I sent the application of to the DVLA they wrote to my doctor for confirmation with regards...