Snellen chart

Snellen chart
PurposeSnellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10)

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor Franciscus Cornelius Donders.[1][2] Many ophthalmologists and vision scientists now use an improved chart known as the LogMAR chart.

  1. ^ H. Snellen, Probebuchstaben zur Bestimmung der Sehschärfe, Utrecht 1862.
  2. ^ Cite error: The named reference Colenbrander was invoked but never defined (see the help page).