If you have any form of eye sight problem that is being treated by a specialist, you find that you will have to prove good eye sight to the DVLA...
I have several people who go through a similar with the DVLA due to eyesight treatment, but instead of the 3 year renewal taht we face as diabetics they are lucky because they only need to prove fit to drive if they have a terration or another operation that might effect there eye sight...
hope this helps
funny thing though when my dad drove (he's gave up driving 10 years a go when he ws 81, his choice) even though he totally blind in one eye never had any problems with the DLVA, but there again he been driving since before the war and never had a acccident