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 average cost for a certified or licensed mitigation contractor to lower radon levels in a slab or basement home is about $1,500, and a crawl space home is about $3,000 or more. Your costs may vary depending on the size and design of your home and which radon reduction methods are needed.n effective radon mitigation system can reduce the radon level in your home by up to 99 percent. Homeowners with radon systems have also experienced a reduction of other indoor air quality issues such as moisture and soil gas intrusion problems in their home.