Science is the sermon of today. In every walk of life, since childhood till old age, science plays an important role in the life of man. Basically, the branch of physics concerned with vision and light is known as optics. This is an important branch which has helped the many discoveries, explorations and inventions in the field of Astronomical physics etc. in particular and science and technology in general. As such this has played vital role in the advancement of science and technology. This encyclopaedic work on optics encompasses authoritative information on all vital theories and their applications in the subject. Efforts are made to incorporate latest developments in the field.