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 clouding of the lens in the eye that affects vision. Most cataracts are related to aging. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.here are two types of cataract surgery. Your doctor can explain the differences and help determine which is better for you: 1  Phacoemulsification, or phaco. 2  A small incision is made on the side of the cornea, the clear, dome-shaped surface that covers the front of the eye. 3  Your doctor inserts a tiny probe into the eye.