A term used in a specific context to indicate a complete absence of visibility or awareness.

दृष्टि शून्य

English Usage: "When the fog rolled in, our sight zero was so limited that we couldn't see more than a few feet ahead."

Hindi Usage: "जब कोहरा छा गया, तब हमारी दृष्टि शून्य इतनी सीमित थी कि हम आगे कुछ ही फीट देख सकें।"