Answer:
Step-by-step explanation:
The formal name for the chart used in an optometrist's examining room is called a Snellen chart or Snellen eye chart. It is named after the Dutch ophthalmologist Herman Snellen, who developed it in the 1860s.
The Snellen chart consists of rows of letters or symbols in various sizes, and it is used to assess visual acuity and measure the sharpness of a person's vision.
Patients are asked to read the letters or symbols from a specific distance, typically 20 feet or 6 meters, and the results are recorded as a fraction, such as 20/20 vision or 6/6 vision, indicating normal visual acuity.