I've downloaded the Snellen and Sloan fonts distributed on this website. I'm on Linux Fedora. I've saved the fonts on ~/.fonts and the fonts are available to my applications (Inkscape, Libreoffice).
However, when I insert text the fonts are mirrored (flipped horizzontally). I guess that the font is built incorrectly... Should the mirrored fonts have their own "style"? Perhaps I should create two styles (or families) within each font using Fontforge?
As you can imagine, I know nothing on the subject, so any hint is appreciated.