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This lecture explores the state of the art and future challenges in 3D printed microoptics, covering topics such as complex microoptics, direct laser writing, imaging through fibers, and fabrication of miniature endoscopes. The presentation delves into the development of novel optical elements, including achromatic lenses, holographic displays, and ultrawide angle objectives. The lecture also discusses the fabrication process, design configurations, and experimental characterization of 3D printed functional microscopes and miniature spectrometers. Additionally, it addresses the advancements in electrically switchable plasmonic nanoantennas and beam steering technology.