If a lesion measures less than 175 um, how is it classified?

A lesion measuring less than 175 micrometers is classified as a focal area of atrophy. This classification highlights that the lesion is relatively small and localized, indicating a localized area of retinal atrophy that is often observed in conditions like age-related macular degeneration (AMD). Focal areas of atrophy are distinct from broader classifications such as geographic atrophy, which involves larger areas of retinal tissue loss. By specifically categorizing lesions based on their size, clinicians can better assess the potential implications for vision, monitor disease progression, and determine appropriate management strategies.