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.
Cataracts are gradual and painless and are manifested by a loss of transparency; glaucoma on the other hand can be either quick and painful or slow and subtle. A cataract is a change in the lens of the eye; the result is cloudiness as light is prevented from entering the eye properly.