Snellen is a digital version of the classic optometric eye chart. Snellen runs on a linux PC and presents the viewer with the standard snellen glyphs, CDEFLNOPTZ. The glyphs conform to the original mathematical properties of the snellen glyphs.

Snellen may be controlled by a keyboard or a remote control.

Snellen is Free Software. Snellen is "owned" by the community of people who use it. You may download, use and copy snellen. But if you make changes to snellen you must contribute your changes back to the community.

Snellen version 1.0 is now available for download. The snellen truetype font is also available for download and may be used in accordance with the SIL Open Font License.