The phrase "most eyes only" can be interpreted to mean something that is restricted to only a select group of individuals. Synonyms for this phrase could include "confidential," "classified," "restricted," "privileged," or "sensitive." It suggests that a particular piece of information or knowledge is not meant to be shared with everyone, and may need to be kept a secret. The phrase can be commonly found in contexts such as government documents, corporate contracts, or even personal conversations. It signifies the importance of discretion, and emphasizes the significance of keeping certain things hidden from public view.