Tiresias (typeface)

Tiresias is a family of realist sans-serif typefaces that were designed for best legibility by people with impaired vision at the Scientific Research Unit of Royal National Institute of the Blind in London. The research basis of Tiresias Screenfont’s legibility claims have been called into question.

Tiresias is the font used in subtitles for digital terrestrial television (DVB-T) in the UK and the Sky Digital satellite service (DVB-S) targeting the UK and Ireland.

The family includes

* Tiresias Infofont – for information labels, optimized for maximum legibility at a distance of 30–100 cm.
* Tiresias Keyfont – for labeling the tops of keys of keyboards, PIN pads, appliances, remote controls (features exaggerated punctuation marks)
* Tiresias LPfont – for large-print publications
* Tiresias PCfont – for raster displays
* Tiresias Screenfont – for television subtitling and on-screen user interfaces
* Tiresias Signfont – a more open spacing for use on signs

Externals links

* [http://www.tiresias.org/fonts/ Tiresias typefaces]
* [http://screenfont.ca/fonts/today/Tiresias/ Critique of Tiresias Screenfont design and research]