|Designer(s)||The Royal National Institute for the Blind (RNIB)|
|License||GNU General Public License|
Tiresias is a family of TrueType realist sans-serif typefaces that were designed with the aim of legibility by people with impaired vision at the Scientific Research Unit of Royal National Institute of Blind People in London. The font was originally designed for the RNIB by Chris Sharville of Laker Sharville Design Associates who was working with John Gill at the time. It has been much criticised.
Tiresias is the font used in subtitles for digital terrestrial television (DVB-T), and digital satellite (DVB-S) targeting the UK. It is also used in Ireland, Denmark and Finland's national public-broadcasting company'. It was also purchased by the state owned TVNZ for use on their DVB terrestrial channels. Norwegian railroad infrastructure company Bane NOR is using the font on info screens.
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, no descender on the J)
- Tiresias LPfont – for large-print publications. A wedge-serif design.
- 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
The Tiresias Screenfont is expensive to license and was sold by Bitstream Inc., who in 2012 were acquired by Monotype Corporation. The acquiring company continues to market Tiresias on its font websites, and it also offers a similar font called Tioga.
This article's Criticism or Controversy section may compromise the article's neutral point of view of the subject. (February 2020)
Criticism has been levelled at Tiresias on the grounds of the lack of professional initial commissioning, the business model, the lack of italics, confusable characters, the product testing and the potential cost to end-users.