Cataracts are the blurred part of your eyes, many blind people are caused by cataracts. Experts say the number of eye problems caused by cataracts is higher than any other factor in the world (including diabetic retinopathy, glaucoma or macular degeneration). In fact, as people age, so does the number of patients with cataracts. Cataracts are also the main cause of eye blindness in the world.When a person develops cataracts, the lens of his eye becomes blurry.As you know, light should pass through a lens, but cataracts are like a barrier to it. So the resulting image will be blurred.