Socrates did not make any contributions to the field of optics. He was a philosopher who lived in ancient Greece from 470 to 399 BCE. His work focused on ethics, politics, and the nature of knowledge. He is best known for his Socratic method of questioning.

While Socrates was a keen observer of the world around him, his primary focus was not on the physical sciences like optics. The study of optics, which involves the behavior and properties of light, was developed by other philosophers and scientists like Euclid, Ptolemy, and Ibn al-Haytham.

If you're interested in learning more about the history of optics, you can research the works of these individuals.