Final answer:
Unauthorized sunglasses in uniform are those that fail to meet the conservative appearance standards set by military or uniformed service regulations, such as those with logos, bright colors, mirrored lenses, or non-traditional shapes.
Step-by-step explanation:
Unauthorized sunglasses in uniform are typically those that do not conform to the regulations set forth by the specific military or uniformed service branch. Regulations often dictate that sunglasses must be conservative and not detract from the appearance of the uniform. For example, sunglasses with logos, bright or non-traditional colors, mirrored lenses, or oversized frames are often not permitted. The intent is to maintain a professional appearance while in uniform. It's important for service members to consult their specific service's uniform regulations for detailed guidance on what is or is not authorized.