Letter Chart
You will be asked to read from a chart with rows of letters descending in size. This test measures how well you see with both of your eyes. An eye healthcare professional will often cover one eye at a time to check for any differences between the two.
![Letter chart](/media/filer_public_thumbnails/filer_public/22/1d/221dc580-b1cd-4726-a874-19d56f3a2149/letter_chart_image.png__1520x1012_q50_progressive_subsampling-2_upscale.png)