The card should be illuminated with lighting typical of that used for comfortable reading
Then try reading the next smaller block of text. (Remember: no squinting!)Go to the smallest block of text you feel you can see without squinting, and read that passage aloud
Continue reading successively smaller blocks of print until you reach a size that is not legible. Record the “J” value of the smallest block of text you can read (example: “J1”).
Description
Jaeger Eye Chart, Near Vision Reading Test Plastic Chart