The term Vascular Eye Part is referring to the Uvea, which is a four letter word. The Uvea is the middle layer of the eye and is composed of three parts: the iris, ciliary body, and choroid. The iris is the colored part of the eye that controls the amount of light entering the eye. The ciliary body is responsible for producing aqueous humor, which helps maintain the shape of the eye. The choroid is a layer of blood vessels that supplies oxygen and nutrients to the retina. Together, these three parts make up the Uvea, which is an important part of the eye's vascular system.