What is a cataract?

It may be a cat's nickname.

No.

A cataract is an eye disease.

How does it form?

Wait.

I will explain.

Each of our eyes consists of a transparent lens.

Is it similar to my camera lens?

Absolutely.

Our eye lens is made up of water and protein.

They are arranged in such a way that keeps the lens clear, and lets light pass through it.

Hence, a sharp image is formed on the retina.

However, as we age, the protein begins to clump together, making the lens cloudy.

This clouding of our eye's natural lens is called a cataract.

In such situations, when light from an object enters our eye, the clumped protein blocks or scatters the light.

As a result, a blurred image is formed on the retina, thus making it hard to see.

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