Certified Technology Specialist (CTS) Practice Exam

What is the average seated eye height in relation to seated head height?

1. 200 mm less than head height

2. 100 mm less than head height

3. The same as head height

4. 50 mm more than head height

The correct answer is: 100 mm less than head height

The average seated eye height is generally considered to be about 100 mm less than the seated head height. This measurement is important in various design fields, particularly in audiovisual environments, where accurate sightlines and ergonomic considerations are crucial. When people are seated, their eye level is approximately at the brow line or just slightly below it, reflecting a natural anatomical positioning. Since the head height includes the full height from the base of the head to the crown, the eyes will typically rest around 100 mm lower than the maximum head height when sitting. This understanding helps in designing seating arrangements, screens, or displays in order to optimize viewing angles and comfort for seated individuals. The other options do not align with commonly accepted ergonomic data and thus do not accurately represent the relationship between seated eye height and head height.