Cataract surgery involves removing the natural lens of the eye and replacing it with an artificial lens (intraocular lens implant or IOL). The plastic artificial lens is permanent, requires no care, and can significantly improve vision.ataract surgery is indicated when the cataract impairs vision to the extent that it interferes with normal daily activities. Cataract extraction is one of the most frequently performed surgical procedures in the world. A cataract is a cloudy or opaque area in the normally clear lens of the eye.
There are 640 acres in a square mile -- there is no such thing as a square acre. And just in case you are interested, 43560 square feet in an acre. idiot detector Â· 1 decade ago
How Many Acres in a Square Mile. Sep 29, 2011 The question about how many acres are in one square mile can be difficult for persons who have nothing to do with farming or some other fields of activity where one has to measure areas. Of course, you can easily guess that a square mile1 is a patch of land which is one mile by one mile.