On the whole, the color of our eyes relies much on how much of the pigment melanin we possess in our iris – the colored part of the eyes. Hence, it’s not hard to understand why the more pigment we have, the darker our eyes shall be. Grey, green, & blue eyes seem to be lighter, since they own less melanin in the iris. Since they possess less pigment, the light eyes may be much more sensitive to the harmful rays of the sun than the black/brown eyes. Apart from providing our eyes with color, melanin is also useful in protecting them from the sunlight.
A Brief Glance At Part Of Our Eyes

- Iris
As one part of our eyes, iris is said to give them color. In fact, it’s just a muscle which owns the shape of a lifesaver. Acting like a window shade, our iris will do tasks of automatically opening & closing to change the size of our pupil. That might then regulate the amount of light admitted into our eyes. The color of our iris-blue, -green, or -brown is often defined by the amount & distribution of melanin. Since brown eyes tend to have more melanin than the blue eyes, they seem to be less sensitive to the bright light.
- Cornea
Our cornea is truly the transparent & curved window. In simple words, all light entering our eyes will come through the cornea. It generally has 3 main layers: the epithelium, the endothelium, and the stroma. Like each part of our body, cornea is in need of nourishment. However, it has to be free of blood vessels for maintaining its clarity; thus, in place of blood, the epithelium will be nourished by our tears, while the stroma & endothelium will be nourished by our aqueous humor. Our cornea gives about 70% of the focusing power of the eye.
- Rods & Cones
Basically, photoreceptors often come in 2 different types, including 6 ½ million Cones and 120 million Rods. Primarily situated in the periphery of our retina, rods are super sensitive. Yes, they will just operate once the light is dim. Plus, they may only detect the large forms & shapes in white, black, and shades of gray. Mainly located in the center of the retina, cones operate in bright light. At that time, the ones in our macula allow our eyes to see details. Red, blue, & green are the 3 varied types of cones. This also enables us to have color vision.
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