Optotype Size Calculator

This app allows you to calculate the exact dimensions of the visual acuity chart optotypes. It includes the most common chart notations and line sizes.

The following notations are included:

- US Feet (20/20|20/25|20/32|..etc)

- UK Metric (6/6|6/7.5|6/9.5|..etc)

- Decimal (1.0|0.8|0.63|..etc)

- LogMAR (0.0|0.1|0.2|..etc)

Just enter the chart distance, notation type, and line size, and get the optotype size corresponding to this criteria.