Retinal vessels are the blood vessels located in the retina, the light-sensitive layer at the back of the eye. They are crucial for supplying oxygen and nutrients to the retinal tissue, which is essential for proper vision. These vessels include both arteries and veins, which work together to maintain healthy blood flow. The health of retinal vessels can be an indicator of overall eye health and can reveal conditions such as diabetes or hypertension. Eye care professionals often examine these vessels during a dilated eye exam to detect any abnormalities or signs of disease.