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.
Radon Mitigation System Costs. If you do need a system installed in your home, expect to pay between $750 and $3,000 for a professionally installed radon mitigation system. The size of your house, the type of system you have installed, and the level of radon gas in your house will determine where you fall on that cost spectrum.