Linux has had a history of supporting visually impaired users (just look at ORCA, the gnome screen reader project). Here are four Distros that can be used by those users!
1) Adriane (“Audio Desktop Reference Implementation And Networking Environment”)
developed by the same person who worked on the first “rescue disk”, Klaus Knoppix (who also named it after his wife, who is visually impaired.) Adriane uses the SUSE Blinux screen reader with a phoneme generator and speech engine for normal output.
2) Ubuntu Mate
A fine, easy to use distro, it’s also Raspberry Pi friendly!
Here’s a link describing why this distro can be setup to be visual impaired friendly, and why you should use it.
3) Kali Linux
The distro you’d never think of, it’s normally associated with Linux Security testers, but it has accessibility tools! Nice work by the developers, who made the effort to reach out to their visually impaired users.
From their website “This is TalkingArch, a respin of the Arch Linux live iso modified to include speech and braille output for blind and visually impaired users. Arch Linux is designed to be simple, lightweight and flexible. TalkingArch retains all the features of the Arch Linux live image, but adds speech and braille packages to make it possible for blind and visually impaired users to install Arch Linux eyes-free. “
They also include audio tutorial files!!