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.
How much does a radon mitigation system cost? The average cost of a radon system is between $800 â $1200. Homes with a crawl space, no gravel under the slab, or a completely finished lower level, a garage attic installation, etc. cost more.