MRCP UK EXAMINATIONS

Detailed explanation-1: -Definition. The iris has received its name from its various colors in different individuals. It is a thin, circular, contractile disk, suspended in the aqueous humor between the cornea and lens, and perforated a little to the nasal side of its center by a circular aperture, the pupil.

Detailed explanation-2: -Anterior chamber-the fluid-filled space between the cornea and iris. Aqueous humor-the clear, watery fluid between the cornea and the front of the vitreous. The aqueous humor bathes and nourishes the lens and maintains pressure within the eye.

Detailed explanation-3: -Anterior chamber: The region of the eye between the cornea and the lens that contains aqueous humor.

Detailed explanation-4: -The sphincter muscle of the iris is a circular muscle that constricts the pupil in bright light, whereas the dilator muscle of the iris expands the opening when it contracts. The amount of pigment contained in the iris determines eye colour.

Detailed explanation-5: -Posterior chamber: The posterior chamber is between the iris and lens. The lens is behind the iris and is normally clear. Light passes through the pupil to the lens.