H15-H22: Disorders of sclera, cornea, iris and ciliary body

Disorders of the sclera, cornea, iris, and ciliary body encompass a variety of eye conditions that affect different parts of the eye. The sclera is the white outer layer of the eye, the cornea is the clear front surface, the iris is the colored part, and the ciliary body is located behind the iris, playing a role in focus and controlling eye pressure. These disorders can result from a range of causes, such as infection, injury, genetic factors, or age-related degeneration. Common symptoms across these disorders may include pain, redness, blurred vision, sensitivity to light, or even loss of vision. The progression of these disorders is highly dependent on the specific condition and its causes. Some may have a slow, gradual onset, while others might progress more rapidly. They primarily affect the visual system, but given the eyes' connection to the nervous system, they can sometimes be related to other systemic conditions.