In the diagnosis of RAO or BRAO, which of the following statements is true?

In the diagnosis of Retinal Artery Occlusion (RAO) and Branch Retinal Artery Occlusion (BRAO), the statement regarding fluorescein angiography being useful when atypical features are present is accurate. Fluorescein angiography is a diagnostic technique that involves injecting a fluorescent dye into the bloodstream and capturing images of the retina as the dye circulates. This method allows for the visualization of blood flow in the retinal vessels and can reveal areas of ischemia or occlusion that may not be apparent through standard examination methods.

In cases where the clinical presentation is atypical, such as an uncertain cause of vision loss or conflicting findings during an eye examination, fluorescein angiography helps clarify the diagnosis by highlighting specific areas affected by reduced blood flow or by identifying unusual patterns of occlusion. The ability to visualize the vascular status of the retina provides essential information for confirming the diagnosis and aiding in management.

The other statements do not accurately represent the diagnostic approach in these conditions. Diagnostic criteria for RAO and BRAO typically rely on clinical evaluation and imaging techniques like fluorescein angiography rather than confirmatory tests or blood markers such as ESR or CRP, which primarily indicate inflammation rather than directly indicating retinal emboli. Furthermore, while