The cornea is the transparent front layer of the eyeball through which sunlight enters. It is the eye’s first barrier, protecting it from harmful external factors, from dust to ultraviolet radiation.
Month: September 2026
Iris of the eye: just a color or an important structure?
The iris is a thin, circular structure at the front of the eye that surrounds the pupil and determines its visible color. We usually perceive it simply as “eye color,” describe its shades, and admire it. But at the same time, it is living tissue that regulates the amount of light entering the eye every moment by changing the size of the pupil.