Did you know there is an Upanishad dedicated entirely to the sense of sight?

If you are looking for the full text in Sanskrit with English or Hindi translations, you can find various PDF versions on authoritative spiritual repositories: Sanskrit Documents

One of the central themes of the Chakshu Upanishad is the concept of vision or perception, not just in a physical sense but also metaphorically. It discusses how our understanding of the world and ourselves is shaped by our perceptions and how these perceptions can lead us to the realization of the ultimate truth. The text posits that the eye (chakshu) is not just a physical organ but a gateway to understanding the universe and one's place within it.