What is a Cataract | Cataract Definition | Cataract Meaning

A common question people have.

The lens is a clear oval structure that sits in the centre of the eye. It is enclosed in a very thin transparent membrane (much like Glad Wrap) called the capsule. Incoming light passing through is focused by the cornea and then the lens to meet at the central part of the retina, the macula. This precise focusing of incoming light is how clear vision is achieved.

what is a cataract

In patients under 50 years of age, the lens is able to change shape and alter the focus of incoming light. Beyond this age, the ability to change shape is lost.

Cataract is a condition where the lens loses its clarity and becomes cloudy. As a consequence incoming light is scattered, impairing focus of the light, and vision becomes blurred. Surgery involves cataract removal of the cloudy lens and replacement with an artificial lens.