Glare: Excessive demand for visual adaptation brought on by the retina's exposure to more light than it can tolerate. Produced when any luminance within the visual field is sufficiently greater than the luminance to which the eye is adjusted.
Highlighting: Emphasizing displayed data or format features, e.g., through the use of underlining, bolding, or inverse video, for calling the user's attention to some displayed area or information.
Hue: One component of the perception of color (for example, red, green, yellow). Other components are saturation and brightness.
Icon: Pictorial or other nonverbal representation of objects or actions.
Illumination: The amount of light (luminance flux) falling on a surface, measured in lumen/m2 = lux.
Input Device: A workstation component used for data entry and display control, e.g., keyboard, trackball, mouse.
Label: Alphanumeric information that identifies or describes an object or displayed data.
Layout: The physical arrangement of the parts and components that make up a module or a unit of equipment.
Line of Sight: An imaginary line extended from the plane of the viewer's eyes; the horizontal line of sight occupies the same horizontal plane as the center of the pupils. The normal line of sight declines 15 degrees below the horizontal; maintaining a horizontal or higher line of sight takes effort and can be fatiguing over time.
Luminance: Luminance is the amount per unit area emitted or reflected from a surface and is measured in candela per square meters (cd/m2).
Menu: A set of related options listed together for selection by the user, i.e. a type of dialogue in which a user selects one item out of a list of displayed alternatives.
Mode: An internally defined state or condition of computer operation, such as keyboard input mode, help mode, edit mode, save mode, planning mode or operational mode.
Reflection: A mirror image of the surrounding environment that is coincidentally superimposed on screen content.
Resolution: A characteristic of a visual display, expressed in pixels per square inch.
Symbol: A graphic or alphanumeric representation of something by reason of relationship, association, or convention.
Workstation: The combination of all job-related items, including the console with all devices, equipment and the furniture, to fulfill certain tasks.
