Vision chart

The , or eye chart, is a type of medical equipment used for testing vision acuity. Identified as a Snellen chart, the chart is printed onto a sheet of paper. This chart has eight lines of block letters. With each line, the number of letters increases and the height of the letters decreases. Vision charts are used in the Vault-Tec Vaults.

The vision charts in the Vaults are communally owned and were passed from one generation to the next. The expectation of Vault residents is that the vision charts are properly cleaned and maintained to ensure their survivability.

Vault 101 Locations

 * Clinic