This review discusses two-photon polymerization lithography (TPL) for imaging optics. TPL is a nanoscale 3D printing technique that enables the fabrication of intricate structures beyond the optical diffraction limit through two-photon absorption in liquid resin. It offers advantages such as alignment-free fabrication, micro- and nanoscale capabilities, and rapid prototyping of complex 3D nanostructures. The review emphasizes the importance of optical performance evaluation criteria, discusses material properties relevant to TPL, fabrication techniques, and highlights TPL's application in optical imaging. It provides a comprehensive overview of TPL's potential in imaging optics, including its high-resolution capabilities, extensive material range, and true 3D processing. The review also addresses challenges in TPL, such as achieving nanoscale resolutions and delivering low surface roughness for complex 3D devices. It discusses the development of TPL for optical imaging applications, covering various categories such as refractive lenses, diffractive lenses, metalenses, gradient index lenses, lens arrays, compound eyes, dynamic lenses, endoscopic lenses, diffractive optical neural networks, computing imaging, and other optical imaging systems. The review also covers imaging evaluation methods, including aberration theories, and discusses the material properties and fabrication technologies of TPL. It highlights the importance of material properties such as refractive index, dispersion, thermal stability, and mechanical stability in TPL. The review also discusses the fabrication of optical elements on different substrates and facets of fibers, which expands the application scenarios of TPL-related imaging optics. The review concludes that TPL has the potential to revolutionize imaging optics by enabling miniaturization, precise control over structure profiles, and high imaging quality. It also discusses the challenges of TPL, such as the need for suitable materials and direct fabrication speed, and the importance of optimizing design, fabrication, and characterization processes to ensure high-quality standards in 3D printed imaging elements. The review emphasizes the importance of understanding the optical performance evaluation criteria and the role of material properties in TPL for imaging optics.This review discusses two-photon polymerization lithography (TPL) for imaging optics. TPL is a nanoscale 3D printing technique that enables the fabrication of intricate structures beyond the optical diffraction limit through two-photon absorption in liquid resin. It offers advantages such as alignment-free fabrication, micro- and nanoscale capabilities, and rapid prototyping of complex 3D nanostructures. The review emphasizes the importance of optical performance evaluation criteria, discusses material properties relevant to TPL, fabrication techniques, and highlights TPL's application in optical imaging. It provides a comprehensive overview of TPL's potential in imaging optics, including its high-resolution capabilities, extensive material range, and true 3D processing. The review also addresses challenges in TPL, such as achieving nanoscale resolutions and delivering low surface roughness for complex 3D devices. It discusses the development of TPL for optical imaging applications, covering various categories such as refractive lenses, diffractive lenses, metalenses, gradient index lenses, lens arrays, compound eyes, dynamic lenses, endoscopic lenses, diffractive optical neural networks, computing imaging, and other optical imaging systems. The review also covers imaging evaluation methods, including aberration theories, and discusses the material properties and fabrication technologies of TPL. It highlights the importance of material properties such as refractive index, dispersion, thermal stability, and mechanical stability in TPL. The review also discusses the fabrication of optical elements on different substrates and facets of fibers, which expands the application scenarios of TPL-related imaging optics. The review concludes that TPL has the potential to revolutionize imaging optics by enabling miniaturization, precise control over structure profiles, and high imaging quality. It also discusses the challenges of TPL, such as the need for suitable materials and direct fabrication speed, and the importance of optimizing design, fabrication, and characterization processes to ensure high-quality standards in 3D printed imaging elements. The review emphasizes the importance of understanding the optical performance evaluation criteria and the role of material properties in TPL for imaging optics.