These days, nothing lasts very long, and things often change for the better, but there are sure things in our community, such as this annual event, which has been going on for 25 years. The first edition in 2000 of the Current Developments in Lens Design and Optical Systems Engineering Conference took place during International Symposium on optical science and technology, 30 July - 4 August 2000 in San Diego. Over 45 oral presentations and ten posters were presented. The chairs were Robert E. Fischer, Warren J. Smith, R. Barry Johnson, and William H. Swantner. The proceeding was numbered 4093 and 24 years later the number is 12666 (2023). This paper looks back on the great moments of our conference, its speakers, the subjects that have come and gone, and those that have remained.
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