Cataracts are cloudy patches in the lens of the eye that can make your vision blurry. They may eventually lead to blindness if they are left untreated. Cataracts can develop in one or both eyes and over time the size of the cataract can get bigger until the whole lens is covered.
The lens of each eye should be clear in order for your eyes to work properly. The clear lens allows light to reach the retina at the back of the eye, which enables you to see things. With a cataract, less light can reach the retina, so your vision is affected. A cataract can be present for a while before you notice you have one. However, having regular eye tests can spot cataracts in their early stages, so it's important to keep up to date with eye examinations. Ideally, you should have your sight checked by an optician every two years, although people over 60 years old may be required to have eye tests every year.
If you have a cataract, it will continue to develop. The only way to restore your vision is by having the cataract removed by surgery. Cataract surgery is one of the most common and quickest surgeries performed, and many people are able to return to their usual daily routine after 24 hours.