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.
A cataract is a cloudy area in the normally clear lens in the front of the eye. Cataracts aren't painful, but they do cause symptoms, including: 1  Blurred/hazy vision. 2  Loss of color perception. 3  Sensitivity to glare.