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
How many square feet in an acre? Acres to square feet area measurement units conversion table shows the most common values for the quick reference. Alternatively, you may use the converters below to convert any other values. 1 Acre = 43 560 Square Feet. Acre is an imperial and U.S. customary system area unit.