hermann snellen herman northrop frye • hermann von helmholtz · · · Info · Definitions · Characters · · hermann snellen · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) Dutch ophthalmologist who introduced the Snellen chart to study visual acuity (1834-1908). Synonyms: Snellen, Hermann Snellen. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073