CNA itself is 90% owned by a holding company, Loews Corporation.This holding company also has interests in offshore oil and gas drilling rigs, natural gas transmission pipelines, oil and gas exploration, and in hotel operations.n May 3, 2005, CNA said it would restate financial results for prior years to correct its accounting for several reinsurance contracts, mainly with a former affiliate, and its equity accounting with this affiliate.
Refraction is a test that optometrists and ophthalmologist use to measure a person's refractive error. a refractive error is when your eye does not bend light coming into your eye properly as it passes through the cornea, the crystalline lens and fluid media to come to a sharp, clear focus onto your retina.
Image by Flickr.com, courtesy of Jule_Berlin. In relation to your eyes, refraction refers to how light waves bend as they pass through your cornea and lens. Your eye's ability to refract light determines its ability to focus light, which establishes how well you see. Your eye has a refractive error if it cannot focus an image sharply. Determining the lens prescription needed to correct the error is called a refraction or refraction assessment. Your eye's ability to refract light depends on the overall length of the eye and the curvature of the eye's surface (cornea).