Optician Sans
A free font based on the historical eye charts
Optician Sans launched on December 17, 2018 with 200 votes, #86 of 2,148 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 7 years on.
What it does
Optician Sans is a free font based on the historical eye charts and optotypes used by opticians world wide.
Optician Sans is a free font based on the historical Snellen and Sloan eye charts and optotypes used by opticians world wide for centuries.
Dutch ophthalmologist Herman Snellen developed the snellen chart in 1862. Based on a strict 5×5 unit grid. Made to measure visual acuity. 10 letters designed by Louise Sloan in 1959, following the same principles as the Snellen chart, but without the serifs. A predecessor of the logMAR charts you typically see at doctors offices today. Optician Sans is a fully functional typeface and a continuation of the historical Snellen and Sloan letters. Optically adjusted for readability to be used as a fully functional display typeface. The typeface, made with Sloan optotypes as the basis of construction, is the most effective letter selection for equal legibility. To make a typeface that…from optician-sans.com
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