Clear outer layer of the eye Crossword Clue

 The clear outer layer of the eye is the cornea. It is a transparent dome-shaped structure that covers the iris and pupil. The cornea is the most important part of the eye's focusing system, and it helps to bend light so that it can be focused on the retina.

The cornea is made up of several layers of tissue, including the epithelium, the Bowman's layer, the stroma, and the Descemet's membrane. The epithelium is the outermost layer of the cornea, and it is responsible for protecting the cornea from infection. The Bowman's layer is a thin layer of collagen fibers that provides support for the cornea. The stroma is the thickest layer of the cornea, and it is made up of collagen fibers and keratocytes, which are cells that produce collagen. The Descemet's membrane is the innermost layer of the cornea, and it helps to maintain the shape of the cornea.

The cornea is avascular, which means that it does not have any blood vessels. This is why the cornea is so clear. The cornea gets its oxygen and nutrients from the tears and the aqueous humor, which is a fluid that fills the anterior chamber of the eye.

The cornea is a very important part of the eye, and it is essential for good vision. If the cornea is damaged, it can lead to vision problems such as blurred vision, light sensitivity, and pain.

The answer to the crossword clue "clear outer layer of the eye" is cornea.