Retinal veins are blood vessels located in the retina, the light-sensitive layer at the back of the eye. They are responsible for carrying deoxygenated blood away from the retina and returning it to the heart. These veins play a crucial role in maintaining the health of the retina by removing waste products and ensuring proper blood flow. There are several major retinal veins, including the central retinal vein and the branch retinal veins. These veins can be affected by various conditions, such as diabetic retinopathy or hypertension, which can lead to complications like swelling or blockage, impacting vision.