The lens of our eyes are found behind the iris and the pupil. It works much like the lens of the camera, where it focuses light into the retina where the image is recorded. The lens are also responsible for adjusting the eye’s focus so we can see clearly for both near and far objects.
The lens is mostly made up of water and protein. The protein is positioned in such a way that the light can perfectly pass through so we can see clearly. Through the years, some of the protein may mass up and start to cloud an area of the lens, which overtime may grow larger and cover more of the lens, clouding up the vision.
Cataracts can either be congenital or developed at a later age.
Acquired Cataracts: There are several factors that can cause acquired cataracts. Exposure to ultraviolet radiation, diabetes, hypertension, obesity and smoking among other things can all contribute to the formation of cataracts. For people under the age of 40, trauma to the eye is the most common cause of this. Secondary causes include chronic inflammation, some types of glaucoma and extreme nearsightedness.
Congenital Cataracts: Though people being born with cataracts are possible, these cases are quite rare. About one-third of congenital cataract cases are hereditary.
Symptoms of Cataract
There’s no clear reason why our lens change over time but certainly, aside from age, there are factors that can speed up the process. Because it develops very slowly and painlessly, most people are not even aware that they already have cataracts. Some of the most common symptoms of cataracts are: