It depends upon how you define cataracts. If cataracts are defined as some decease in sharpness of vision related to lens clouding with age then the answer is yes. However, a functional definition of cataracts should define them as changes which significantly impair vision. With this definition the answer is NO!
In our practice we call early changes to the lens in the eye, "yellowing." That is what it is! The lens of the eye turns yellow and medically we call that Nuclear Sclerosis. Because it may have a minimal impact on vision in our practice we don't call it a cataract.
When we see even the earliest signs of lens yellowing, we recommend that our patients add antioxidant and cod liver oil supplements to their diets. In addtion we councel them on the importance of aerobic activity. This can make cataracts as word that is never used to describe a cause of your peronal vision loss.