Will a doctor say that it has no impact upon your ability to drive?
You can appeal. There is a mandatory right to appeal any decision of the DVLA.
The question really is whether there is any point. The burden of proof is upon you to show that your condition is not one that would impact upon the safety of the roads.
The reality is that unless you are going to be able to call established medical evidence to the effect that you will be safe to drive there is no pout in pursuing an appeal as it will just be a waste of money and of time.
You might well be able to do that but that is the test you must reach.
Can I clarify anything for you?