TIL the stringy colored part of your eye is a pigmented layer called the stroma. The stroma is a fiberious connection from the pupillary sphincter(a muscle in your eye) to the pupil(the
Optometry case - The iris consists of two layers: the front pigmented fibrovascular layer known as a stroma and, beneath the stroma, pigmented epithelial cells. The stroma is connected to a sphincter