I hope this message finds you well, present circumstances excluded. You absolutely have a case to present at your hearing. You need to focus the results of your hearing on just getting another chance to prove that you can drive with the assistance of the mirrors in a safe and steadfast manner.
Moreover, I would recommend that you get at least one physician note from a treating physician (although the more the better) to bring with you to the hearing in which they give you clearance to drive with the extra safety equipment.
There are numerous people with physical limitations that are no fault of their own that are licensed to drive...even when special equipment is necessary to assist them in their endeavors. Most of these people have medical letters of clearance on file with the DMV. This will make it much more likely that you get another chance to drive test. Once you test again, I have no doubt you will be cleared.
Things to bring with you to the hearing:
(1) Physicians letter or letters;
(2) Pictures of the new mirrors that assist you;
(3) A written statement that is notarized in which you state that with the assistance of the mirrors you are a safe driver and in which you state you have no intent to drive any vehicle that does not have such additional mirrors.
In the hearing be humble but confident in yourself and your case. The letter mentioned in (3) above is simply an additional item to illustrate your seriousness relative to this matter. You also need to stress the severe problems you will face without the ability to drive.
Let me know if you have any additional questions or comments.
Best wishes going forward!