The refresh rate (most commonly the "vertical refresh rate", "vertical scan rate" for CRTs) is the number of times in a second that a display hardware draws the data. This is distinct from the measure of frame rate in that the refresh rate includes the repeated drawing of identical frames, while frame rate measures how often a video source can feed an entire frame of new data to a display.
For example, most movie projectors advance from one frame to the next one 24 times each second. But each frame is illuminated two or three times before the next frame is projected using a shutter in front of its lamp. As a result, the movie projector runs at 24 frames per second, but has a 48 or 72 Hz refresh rate.
On CRT displays, increasing the refresh rate decreases flickering, thereby reducing eye strain. However, if a refresh rate is specified that is beyond what is recommended for the display, damage to the display can occur.
For computer programs or telemetry, the term is also applied to how frequently a datum is updated with a new external value from another source (for example; a shared public spreadsheet or hardware feed).
Refresh is to upgrade and reestablish a whole or portion of a program. This could mean a programmed computer interface, an event, or a mind frame, brain or mind map. Refresh is to restore a program to a fresh platform.
Refresh is also known as clearing, cleaning, and creating.
Read more about Refresh Rate: Cathode Ray Tubes, Liquid Crystal Displays, Computer Displays, Stereo Displays, Televisions, Displaying Movie Content On A TV, Computer Data and Telemetry
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—Ellen Henrietta Swallow Richards (1842–1911)
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—A.E. (Alfred Edward)