What Type of Lens is Present in Human Eye?

By | July 16, 2020
What Type of Lens is Present in Human Eye

The lens present in the eye is what allows you to see by reflecting light onto an object and forming an image in your brain. “What type of lens is present in the human eye?”. In this article, we’ll discuss what lens is, the type present in a human eye, and their formation.

First things first,

What is a Lens? 

A lens forms an image by bending light. It’s a transparent object found in eyeglasses, cameras, microscopes, telescopes, and even in the human eye (and every other living being on the plant except plants). The light rays bend upon contact with the lens, and they bend in a certain direction that depends on the shape of the lens.

There are two types of lenses: a concave lens and a convex lens. A concave is thinner in the middle and thicker at the edges, while a convex is the opposite of that. Light rays spread apart upon contact with a concave, while a convex lens decreases the distance between the light rays by bending them (as a result, they focus on a point on the other side of the lens).

In this article, we’ll be looking at the convex lens in particular. It’s the same type of lens found in the human eye. It’s also called converging lenses because it causes light to focus/converge.

Formation of the Eye:

The human (though very complicated) contains a few important structures that form images of objects we see.  The first one is the cornea: a thin (clear) membrane that covers the outer part of the front of the eyeball. It’s made of collagen, a very tough and strong type of protein, and it’s what light passes through first.

The cornea is a type of convex lens because of its curved surface and does the same thing a convex lens does. (Focusing on the light rays, and bending them to form an image). The light then passes through another convex lens (the lens present in the eye).

The light rays are focused even further, causing them to hit the retina located at the back of the eyeball. The retina consists of rods and cones (cells that are sensitive to light and help form the image).

The cornea and the lens present in the eye focus the light onto the retina, stimulating the cells, and as a result, the cells send signals to the brain that then forms the image, allowing you to see! Over time, or due to some factors, this process becomes difficult due to macular degeneration.

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We hope this article answers your question: “What type of lens is present in the human eye”. If you have any further queries or would like to change/add something to this article, feel free to comment down below!