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.
The posterior subcapsular cataract (PSC) is more commonly associated with other conditions such as eye injury/trauma, diabetes, and certain types of medications (steroid use, etc.). The PSC cataract may develop quickly in that it only occupies the very back surface of the lens. It need not grow throughout the lens.