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Topic :Light

The Human Eye Can Detect 10 Million Different Colours.

How do eyes alow us to see?

1.Light enters the eye through the cornea. This is the clear, dome-shaped surface that covers the front of the eye.2.From the cornea, the light passes through the pupil. The iris, or the colored part of your eye, controls the amount of light passing through.3.From there, it then hits the lens. This is the clear structure inside the eye that focuses light rays onto the retina.4.Next, light passes through the vitreous humor. This is the clear, jelly-like substance that fills the center of the eye. It helps to keep the eye round in shape.5.Finally, the light reaches the retina. This is the light-sensitive nerve layer that lines the back of the eye.6.The optic nerve is then responsible for carrying the signals to the visual cortex of the brain. The visual cortex turns the signals into images.

Interesting facts

Your eyes are about 1 inch across and weigh about 0.25 ounce. The human eye can differentiate approximately 10 million different colors. Our eyes remain the same size throughout life, whereas our nose and ears never stop growing. The human eye blinks an average of 4,200,000 times a year. This means if you were given a nickel for every time you blinked you would make $210,000

What is the most important thing in the eye?

By helping to focus light as it enters the eye, the cornea and the lens both play important roles in giving us clear vision. In fact, 70% of the eye's focusing power comes from the cornea and 30% from the lens.

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