Eye color is defined by the iris. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm . The iris consists of two layers: the front pigmented fibrovascular layer known as a stroma and, beneath the stroma, pigmented epithelial cells.
What is the iris of the eye?In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, annular structure in the eye, responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. Eye color is defined by the iris. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm .
What are the different types of iris patterns?The three most common types of iris patterns are: Pigmented rings: Colored bands that are wide and wrapped around the pupil. Crypts: Diamond shaped holes that vary in size, located throughout the iris. Furrows: Pale lines that curve around the iris.
What are some disorders of the iris?Iritis is the inflammation of the iris. The infection usually develops in one eye, although both eyes can be affected. Symptoms of iritis include red, painful eyes, headache, blurred vision, and sensitivity to light. Cataracts, glaucoma, and vision loss are common complications. This is a harmless condition where the pupils are different sizes.
