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 painless, cloudy area in the lens of the eye. The lens is enclosed in a lining called the lens capsule. Cataract surgery separates the cataract from the lens capsule. In most cases, the lens will be replaced with an intraocular lens implant (IOL).If an IOL cannot be used, contact lenses or eyeglasses must be worn to compensate for the lack of a natural lens.ome complications can be treated and vision loss reversed, but others cannot. Complications that may occur with cataract surgery include: 1  Infection in the eye (endophthalmitis). 2  Swelling and fluid in the center of the nerve layer (cystoid macular edema). 3  Swelling of the clear covering of the eye (corneal edema).