In which condition do you find 'blood and thunder' appearance in the retina?

The 'blood and thunder' appearance in the retina is a characteristic finding associated with central retinal vein occlusion. This condition occurs when there is obstruction of the central retinal vein, leading to a backup of blood in the retina. As a result, there is extensive retinal hemorrhage, edema, and sometimes cotton wool spots, which collectively create the striking visual appearance that resembles a stormy sky—hence the term 'blood and thunder.'

In central retinal vein occlusion, the presence of widespread hemorrhages, particularly in the form of flame-shaped or dot-and-blot types, contributes to a distinctive pattern that helps in the diagnosis. This appearance indicates severe retinal damage and is crucial for timely intervention to prevent further visual loss.

While diabetic retinopathy and other conditions like retinal detachment and macular degeneration have their own unique retinal findings, they do not present with the same pattern of extensive hemorrhages associated with central retinal vein occlusion. Understanding these distinctions is critical for clinicians in recognizing various retinal pathologies and managing them effectively.