If you’re approaching middle age and notice that your vision has become somewhat blurry, you should schedule a comprehensive eye exam. Cataracts are often responsible for blurry vision, faded color perception, reduced night vision, and/or increased glare from light sources. Other symptoms of opacity (clouding) of the eye lens include double vision that does not go away when the other eye is closed, increased nearsightedness, reduced ability to judge contrasts, and/or the need for more light for reading and performing detailed work. The trouble is that these symptoms may arise so gradually and subtly that those in the early stages of cataract formation may not even fully realize that their vision is changing. An eye exam can bring some clarity. Most cataracts occur with aging, but can also be present at birth (congenital cataracts) or occur at any age as the result of an eye injury (traumatic cataracts). Cataracts also can be caused by diseases such as diabetes or can occur as the result of long-term use of certain medications, such as steroids. Especially in the early stages of cataract formation, treatment with stronger eyeglass or contact lens prescriptions may help compensate for vision loss.