This reminds me of this wired article[1] when Steve Jobs died, whilst not directly related to blindness - it is touched upon - in my experience few firms have gotten it as right on accessibility as Apple, and definitely nowhere close several years ago, I haven't checked much in the last few years on android.

The top comment on Jobs personally intervening when a bluetooth stack had a bug in an iMac is pretty touching too.

[1] - http://www.wired.com/business/2011/10/steve-jobs-disability/