While standing in formation, what is the protocol regarding the use of sunglasses?

In military protocol, wearing sunglasses while standing in formation is generally not permitted because it obscures facial expressions and eye contact, which are important for discipline and communication. The tradition emphasizes respect and visibility among members of the formation as well as towards superiors. Maintaining a uniform appearance is a crucial aspect of military ethos, and allowing sunglasses could detract from the collective image the formation aims to represent. This standard reinforces the importance of focus and unity in a formation, where each service member is expected to present themselves in a manner that reflects the values and professionalism of the service.