Abnormal retinal vascular morphology Arteriovenous crossing sign 2025-04-26T13:13:44Z AV crossing changes Gunn sign This feature may be present in diseases such as hypertensive retinopathy and retinal vein occlusion. A retinal vascular abnormality characterized by indentation or compression of a retinal vein at an arteriovenous crossing, leading to changes in venous caliber. AV crossing signs are commonly associated with hypertensive retinopathy and may contribute to retinal vein occlusion. They are indicative of vascular remodeling due to chronic hypertension or other systemic vascular diseases. Arteriovenous nicking AV nicking