I worked in the Optical Field (High End Glasses) for 12 years. During that time I developed Hypersensitivity to Synthetic odors. I looked that up and found Hypersensitivity Pneumotsis. I was exposed to highly respirable dust coming off of the machine that cut the polycarbonate and thiourethane lenses for glasses every day. Low exposure however the particulates come in at 2-5 on the 0=10 scale. I also was exposed to decomposition materials fumes gases and isocyanate or thioisocyanate was one of many. I accidentally discovered that I had Lung cancer and had surgery in 2010. the cancer was found at the base of the right lung. I had been a smoker but not for 26 years. I am thinking I may have been underdiagnosed. I am thinking that I may well have Hypersensitivity Pneumotosis. I know it is generally affiliated with organic dusts. What about the conditions I am describing here? The industry is not overseen here (although in the countries where the lenses are manufactured extraction ventilation is called for. Thank you, Nancy (Ps I do have scarring on the lungs and mild emphesema. (sp) I also used to have huge amounts of mucus coming up at night while I was trying to sleep and dry cough . I also have eczema a side effect listed on the MSDS sheets for dust reactions.