Look for Revised Editions: Optics is an evolving field. Always aim for the "S. Chand" revised editions, which include updated sections on fiber optics and laser technology.

Geometrical Optics: Detailed sections on Fermat’s Principle, cardinal points of thick lenses, and various types of optical aberrations and their removals.

Diffraction: Comprehensive analysis of both Fresnel and Fraunhofer classes, including the resolving power of optical instruments like telescopes and microscopes.