One very specific thing I remember from discussions I had with a blind programmer was to use of multi-line comments (/* /) in favour of line-comments (//), especially for comments that do span multiple lines.

That helps a lot because with a screen reader “slash star <comment text> star slash” is significantly more listenable to when compared to “slash slash <one line> slash slash <another line> slash slash <third line>…”

Surprisingly this is the only thing I cannot seem to find around my IRC logs… Digging through the logs other things that were called out to make comprehension harder for blind people are:

* Unicode identifiers;

* Boilerplate you cannot easily skip past without losing context (common in e.g. Java);

* Typos (esp. if done on purpose, inconsistently);

All this comes from their preferred interface being a screen reader which, I believe, is true for most blind programmers.