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Why do some people have 2 different coloured eyes?

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Why do some people have 2 different coloured eyes?

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Central heterochromia is when the eyes show various colours, such as a blue iris with a golden-brown ring around the pupil. Sectoral heterochromia is when one iris has a splash of colour that's different from its overall colour, a trait that actress Kate Bosworth has. Heterochromia iridum is when someone has a colour on one eye and a different one on the other naturaly.

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When the light travels through the lens it inverts the image to the retina then the image travel through the optic nerve to the brain which flips the image the right way around.

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The pupil opens to let the light in. The sclera covers most of the eye and is made of very tough material, it delivers blood to the veins. The cornea helps the eye focus and has a transparent dome. The iris adds colour to your eye.

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Most people are colour blind from inheritance (genetic) from their birth parents . Colour blindness means that you have trouble seeing red, green, or blue or a mix of these colours. It's rare that a person sees no colour at all. Having colour blindness can change your life. It may make it harder to learn and read, and you may not be able to have certain careers.

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Where does the light travel in the eye?

Light rays enter the eye through the cornea, the clear front part of the eye. The cornea's power bends the light rays in a way that they pass freely through the pupil, the opening in the center of the iris through which light enters the eye. The iris works like a shutter in a camera. It has the ability to enlarge and shrink, depending on how much light is entering the eye.

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When you look at an object the wavelengths of reflected light determine what color you see. The light waves reflect off the object and hit the retina at the back of your eye. The cones are responsible for colour vision and the rods are responsible for light and dark changes and shape and movement. The signal is then sent along the optic nerve to the brain which processes the information and tells the eye what colour it is.

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The coloured part of the eye is called the iris. The black small circle in the eye is called the pupil, and the white part is called the sclera. In the back of the eye there is a optic nerve here's a diagram to help and a video!