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
Acres To Square Miles Conversion. For other units of area conversion, please go to Area Conversion. Acres to square miles conversion factor is 0.0015625. To find out how many square miles in acres, multiply by the factor or simply use the converter below. 1 Acre = 0.0015625 Square Miles. Acre is an imperial, US customary systems area unit. Used commonly for measuring the land, in agriculture and forestry. The abbreviation is ac.