Exposure can enhance hearing loss caused by noise exposure. The greater the exposure the greater the risk. Risk factors such as UVB exposure and smoking can be addressed. By contrast, astronauts on the Moon risk exposure to radiation. The levels of PFOA exposure in humans vary widely. Numerous studies suggest a serious impact on the health of various populations from this exposure. The sclera is highly resistant to injury from brief exposure to toxic chemicals. This can be calculated as an inhalation exposure. Thylakoid extent can change within minutes of light exposure or removal. CDs are susceptible to damage during handling and from environmental exposure. The likelihood of developing COPD increases with the total smoke exposure. Prevention centers around reducing exposure to asbestos. A rare condition that can develop from higher than average androgen exposure is clitoromegaly. This generally creates an opportunity for greater brand exposure. The symptoms of frostbite progress with prolonged exposure to cold.