The Reflection Of The Human Eye Work

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How does the human eye work?
The cornea is clear and at the front of the eye. When light rays enter it, the cornea refracts it through the pupil and then the iris. The iris controls how much light may pass through the pupil by expanding or shrinking. Next, the light ray will enter the lens. This also refracts light by changing its shape with the help of the ciliary muscles and the suspensory ligaments. The light will go through a dense jelly-like tissue named the vitreous humour and eventually focused at the back of the eye onto the retina. The retina is a light sensitive tissue and covered with rods and cones. These receptors will capture the light ray and transform it into electrical impulses. They get sent off through the nerve fibres, then the optic nerve, and then finally the brain. The picture given by the retina is upside down so our brain will next turn it the right way up.
Our bodies have the capability to endure large scars but, a slight scar on the cornea can lead up to our vision becoming impaired. The retina will process the light rays, into light impulses that need to be transferred to the brain to create an image, which are focused on to them by the cornea. So, any deep injures experienced by the cornea can lead to corneal scarring which would affect our vision.
Focusing on near and distant objects
People that have trouble focusing in near or a distant object is due the light rays entering their eyes are unable to focus on the retina. This is a very common

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