Short-sightedness. Someone with short-sightedness can see near objects clearly, but cannot focus properly on distant objects. This is caused by the eyeball being elongated, so that the distance between the lens and the retina is too great.
Radon Symptoms. What are the symptoms of radon poisoning? Since radon is the #2 cause of lung cancer in the U.S., respiratory ailments are the most likely signs of radon-related distress. A persistent cough, hoarseness, breathing difficulties, and recurring respiratory infections are all possible indications of radon poisoning.
Radon is a colorless, odorless and tasteless gas. You can not see it or smell it. There will not be any immediate radon exposure symptoms, however radon can be doing damage internally due to its radioactive nature. The only way to know if you are being exposed to radon is to do a radon test.