Well, SSI and SSDI have listings that are "sure fire" approvals - you can look these up on the SS.gov website. If you cannot find them please email me and I will be glad to send you the listings. One of the main things you need to prove a disability that is not one of the listings - and believe me, they are tough! - is medical proof that you are disabled. If you have a Dr who is willing to write a statement to that effect, and it has to say how it disables you, not just that you are disabled, that will help. Any and all medications along with the side effects will also help. You must also prove that you have been or are expected to be disabled for 12 months or more. I do know with your disability they are considering laser surgery as a way to deal with the lesions so SSI may consider you not disabled if you have not gone through this. I know a lot about disability as I work with it and can give you some assistance and advice. I am not an attorney and this would only be my opinion and what I, myself, have learned over the years.
Depression is always a "good" thing to have on your application but again, you must have proof that you have seen a Dr for this too. They do not consider the fact that you have no resources to see a Dr in their considerations. 70% of all cases get turned down the first time you submit a claim for disability. Once you get that first turn down you should hire an attorney to do the rest - they are mandated by the feds on how much they can charge - either 25% of your first check, as it is usually a large check for the retro pay, or 5300.00, which ever is smaller.
Good luck to you and email me if you need support!