1.6.1-1 VDU Resolution

The display should have adequate resolution; i.e., users should be able to discriminate all display elements and codes from maximum viewing distance.

Additional Information:
The Modulation Transfer Function Area (MTFA) is a measure of resolution; it should have a value of at least 5. This value may be directly developed from microphotometric measurements, or for monochrome VDU displays, it may be estimated using the formula given in Equation 1.3.