Snellen - logMAR Visual Acuity Calculator
Enter a Snellen or logMAR value into the form below to convert.
Convert Snellen to logMAR
Convert logMAR to Snellen
In addition to interactive use of the calculator, links to the calculator may contain either logMAR or Snellen values that will be automatically evaluated. To evaluate a logMAR value, add the following to the link: '?l=x
', where x is the logMAR value to be evaluated. For example, this link
will automatically evaluate logMAR -0.2. To evaluate a Snellen value, you may provide just a denominator (sd), or both a numerator (sn) and denominator. If only a denominator is provided, the numerator is assumed to be 20. For example, this link
will evaluate 6/12.