Open your PDF reader and ensure the "Actual Size" or "No Scaling" option is selected. If the chart is shrunk to fit the paper, the results will be invalid.
Standard Snellen charts are designed for a distance of 20 feet (6 meters). Some home versions are scaled for 10 feet; check the instructions on your specific download. Step-by-Step Instructions for the Home Eye Test eye test chart pdf download
To get started, ensure you have a , letter-sized paper , and a measuring tape to mark your standing point. Open your PDF reader and ensure the "Actual