Optical testing is a method used to evaluate the performance and quality of optical components, such as lenses, mirrors, and prisms. This process involves measuring various properties, including light transmission, reflection, and distortion. By using specialized equipment, technicians can ensure that these components meet specific standards and function correctly in applications like cameras, telescopes, and microscopes. The testing can include techniques like interferometry, which analyzes light waves to detect imperfections, or photometry, which measures light intensity. These assessments are crucial in industries such as aerospace, telecommunications, and medical imaging, where precision in optical systems is essential for optimal performance.