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.
Refraction is the bending of light as it passes through one object to another. Vision occurs when light rays are bent (refracted) as they pass through the cornea and the lens. The light is then focused on the retina.The retina converts the light-rays into messages that are sent through the optic nerve to the brain.The brain interprets these messages into the images we see.he light is then focused on the retina. The retina converts the light-rays into messages that are sent through the optic nerve to the brain. The brain interprets these messages into the images we see.