An optical engineering degree focuses on the study and application of light, lenses, and optical systems. Imperial College London has offered an advanced programme in optics for over 90 years and the current MSc Optics and Photonics and MRes Photonics draw on our experience as one of the largest centres for optics-based research and application in the UK. The second and third most common degree levels are master's degree degree at 22% and master's degree degree at 11%. What should I major in to become an optical engineer? You should. Becoming an optical engineer typically begins with a strong educational foundation in engineering and physics.