Well I don't pay attention to mainstream news. I'm a technology guy, and pay attention to what is being worked on and what progress has been seen. I don't know about blindness, cause there's a lot of things that can cause blindness, but as far as I'm concerned we already have a cure for cancer but we're just testing the crap out of it first. Aids is also just around the corner cause there's been some success in that area. I'd give cancer 5 years before it's mostly cured, and AIDS another 7 years. The drugs given to AIDs patients is so good that they barely show up in viral tests.
There's always a monkeys paw to this sorta thing, cause nothing moves forward before it moves backwards a little, but the technology is there. Look at this dude who tool an anti-cancer drug and his hair turned from grey/white back to his youthful color. I think we'll have a cure for grey hair and even hairloss by the year 2020. And I don't mean hair dye and hair plugs either. There's too much to cover, but it's not a matter of if but when.
Then feel free to not take the drugs or procedures that reverse aging. I'll take the NAD+ while you wither and die, as it should be.