The choroid is a layer of blood vessels and connective tissue located between the retina and the sclera in the eye. It plays a crucial role in providing oxygen and nutrients to the outer layers of the retina, which is essential for maintaining healthy vision. The choroid is rich in melanin, which helps absorb excess light and reduces glare. In addition to its supportive functions, the choroid also contains cells that can produce certain growth factors. These factors are important for the development and maintenance of the retina. Any abnormalities in the choroid can lead to vision problems, highlighting its significance in eye health.