cornea

The cornea is the clear, dome-shaped front part of the eye that covers the iris and pupil. It plays a crucial role in vision, as it helps to focus light that enters the eye. The cornea is made up of multiple layers, providing protection against dust, germs, and injury. It is avascular, meaning it doesn't contain blood vessels, and gets its nutrients from tears and the fluid inside the eye. A healthy cornea is essential for clear vision, and issues with it can lead to vision problems, making regular eye care important.