The spelling of "plane of regard" may be confusing due to the silent "g" in "regard." The correct pronunciation can be represented in IPA phonetic transcription as [pleɪn əv rɪˈɡɑːd]. The word "plane" is pronounced with the "ay" diphthong, as in "day" or "say," while "regard" is pronounced with a long "i" sound, as in "ride" or "time." Understanding the correct phonetic pronunciation of this term can prevent confusion and miscommunication in the aviation industry.
The term "plane of regard" refers to the imaginary boundary or area within which an individual directs their attention and focuses their gaze. It represents the horizontal and vertical field of vision that encompasses the space in front of a person's eyes, enabling them to perceive and respond to visual stimuli.
In practical terms, the plane of regard can be visualized as a two-dimensional area in which one's eyes are oriented. When an individual is looking directly ahead, the plane of regard lies in a horizontal plane, encompassing the area from the leftmost to the rightmost point that can be seen without moving the eyes. Similarly, it extends vertically from the lowest point of sight to the highest without any movement.
The notion of the plane of regard is particularly relevant in various contexts, including human-computer interaction, aviation, and robotics. In these fields, understanding and considering the plane of regard ensures that devices, displays, or systems are appropriately positioned or programmed to be within the user's field of vision and easily accessible.
Overall, the plane of regard is a fundamental concept in human perception that determines the range of vision and serves as a foundation for designing and optimizing interactive experiences, enhancing safety, and improving overall usability.
An imaginary plane through which the point of regard moves as the eyes are turned from side to side.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.