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 (optics). Refraction is the phenomenon that causes a light ray to bend when it hits an optical lens surface (or other medium that can act to transmit light e.g. water). Refraction occurs when light strikes the surface of the new medium.As the light enters a dense medium is slows the light wave down.The light is passing from an optical medium (like air) to another optical medium (like glass).As the density of the medium changes the light striking the surface is refracted. The refraction is most obvious when when the light strikes the new medium at an angle.he light is passing from an optical medium (like air) to another optical medium (like glass). As the density of the medium changes the light striking the surface is refracted. The refraction is most obvious when when the light strikes the new medium at an angle.