It is covered with an epithelium that, unlike our skin, is clear. An erosion or scrape on the cornea in which some of the epithelium is lost. Colored part of the eye.
Brown irises have pigment.
Blue irises have much less pigment. The front part of the eye is full of clear fluid called aqueous humor. The aqueous humor is made in the ciliary body and drains via the angle. Elevated intraocular pressure that is associated with vision loss. Glaucoma occurs when the drainage angle is plugged, the drainage angle is abnormally formed, or the normal flow of fluids in the eye is blocked.