It is an information to state that any action,process or function has begun.It is the US abbreviation for the name of the Canadian Province of Ontario.It is a preposition mean â¦ ing that one object is in contact with, and usually above, another object.
Sparing the nucleus: Cortical cataracts are in a layer of the lens outside of the nucleus which is the center of the lens. They are sometimes congenital. Depending upon the density they may disturb the vision but sometimes are thin enough not to be a problem.
All About Cataracts. A cataract is the clouding of the normally clear lens of the eye and occurs most commonly as a natural part of the aging process. Eventually everyone will get a cataract; in fact, each year over 2 million people have cataract surgery. Blurred vision and glare are the most common complaints offered by patients with cataracts.