What is the expected Arteriovenous (A:V) ratio in a normal fundoscopic exam?

In a normal fundoscopic exam, the expected arteriovenous (A:V) ratio is indeed 2:3. This ratio reflects the relationship between the size of the retinal arteries and the size of the retinal veins.

Specifically, in a healthy individual, the arteries are typically narrower than the veins. A 2:3 ratio indicates that for every two units of arterial diameter, there are three units of venous diameter. This normal ratio helps clinicians assess vascular health and detect potential conditions such as hypertension or other retinal vascular diseases.

Observing this specific ratio assists in assessing blood supply to the retina and identifying early signs of systemic diseases, as changes in the A:V ratio can indicate underlying pathologies. Hence, understanding the significance of a 2:3 A:V ratio is crucial for accurately interpreting retinal findings during a fundoscopic exam.