Typographer Fábio Duarte Martins of the Norwegian design company Anti Hamar created the Optician Sans font for their client Optiker-K that very cleverly uses both the historic Snellen and the current Sloan letters used on eye charts around the world. The client liked the typeface so much that the company decided to release it as a free font for anyone who wishes to use it.
Optician Sans is a free typeface based on the historical eye charts and optotypes used by opticians world wide. Optician Sans is based on the same visual principles as the LogMAR chart, adjusted to be used as a fully functional display typeface.
via designmodo
