A cataract is one of the most common eye diseases and is a part of the normal aging process. After the age of 50, it is quite probable that the human eye starts to develop some form of this ocular disease. The word cataract is derived from the Latin cataracta, meaning ‘waterfall’ and from the Ancient Greek καταρράκτης (katarrhaktēs), which means ‘down-rushing’. Just like how rapidly rushing water is viewed as white, it may be a metaphorical term to describe the similar appearance of advance ocular opacities.
A cataract is the clouding or opacification of a normally clear eye lens. The natural lens of the eye, also known as a crystalline lens is mostly made of water and protein. Due to a change in that protein structure over time, the natural lens becomes increasingly cloudy – gradually causing the cataract. Cataract is one of the leading causes of blindness in the world. Thankfully, with the advancement of cataract surgery, it is now an easily treated condition in most cases.