The leading causes of irreversible blindness worldwide is diabetes mellitus. And in United States, that is the most common cause of blindness in people younger than 65 years.
Moreover, it is not only causing actual blindness, but also a wide range of other diabetic eye disease complications that can cause you problems.

Diabetes mellitus may cause:

* reversible, temporary blurring of the vision
* can cause a severe, permanent vision lost…. Read more »