Photorefractive keratectomy. Photorefractive keratectomy (PRK) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis) (LASEK) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses.
One acre is 43,660 square feet so 10 acres is 435,600 square feet. The area of a square is L 2 where L is the length of a side, so if the shape really is a square . L 2 = 435,600 square feet. so. L = Sqrt(435,600) = 660 feet. Penny
To find out how many square miles in acres, multiply the acre value by the conversion factor or use the converter. 1 Acre = 0.0015625 Square Miles. For example, to find out how many square miles there are in 1000 acres, multiply the acre value by the conversion factor, 1000 ac * 0.0015625 = 1.5625 sq. miles in 1000 acres. Acre is an