Blindness & Visual Impairment Support Group
Blindness is the condition of lacking visual perception due to physiological or psychological factors. This is the group to discuss living with blindness, sharing experiences, and for those that may be facing the prospect of a life without sight. Find support and answers among people who know what you're going through.
My best advice is listen carefully to options from their doctors, research online the suggested treatments, perhaps seek a second opinion and find people to talk with that are going through something similar as you are doing here. Perhaps a support group if your brother or friend is willing or able to go to meetings.
There are sites that offer suggestions and tips for those of us with vision impairment, there are lots of great technological items that make assist in maximizing the vision that is left.
The difficult part is dealing with the emotional side of it. They are lucky to have someone like you who cares enough to do some research.
I like these sites
http://www.afb.org/default.aspx
http://www.lucentis.com/lucentis/index.html
in your state look for Office of Vocational Rehabilitation for the Blind
http://www.independentliving.com/