DIOPS is a convention event representing Korea's optical science industry and an eye-wear event that the world is interested in. Daegu City is recognized as one of the world's top three eye-wear cities. As DIOPS celebrates its 20th anniversary, this project was carried out for a new branding strategy. The concept of a new symbol is a spirit of challenge and variability that responds to the changes of the times, showing new combinations and results every time the alphabet of DIOPS is constantly circulating. As the circulating alphabet is highlighted by the frame, it represents a time of DIOPS.