Light from an object passes through the cornea which is a transparent dome like structure covering the iris. The light rays are refracted by the cornea onto the lens. The light rays are refracted a second time whilst passing through the lens and focussed onto the retina â the light sensitive part of the eye.
The average Radon mitigation cost in Portland, Oregon, or Vancouver, Washington is between $800 to $2,500 with an average of $1,200.
The US EPA estimates costs at about $350 - $500 for mitigation in new homes compared to costs of $800 - $2500 for installing upgrades in existing homes. 14 Removing radon from water can be much more expensive.t is the leading cause of lung cancer for non-smokers. 2 The New Jersey Department of Environmental Protection (NJ DEP) recommends radon testing for all homes in New Jersey. If the radon concentration is 4 pCi/L or higher, a radon mitigation system is recommended. The U.S. unit of radioactivity is the Curie (Ci).