As such some of what we see is just the brains interpretation of sensations from the eye structure and the pressure applied to it. Try rubbing your closed eyes and you will see what I mean. Always remember that the number one job of the brain is pattern recognition.
Emphysema is a form of chronic (long-term) lung disease, usually caused by smoking. Because of lung damage, people with emphysema have difficulty blowing air out. The major symptom of emphysema is shortness of breath.
Causes of Emphysema. The most common emphysema causes are from breathing in fumes and other irritants that damage the lungs and airways. Cigarette smoking is the most common irritant that causes the disease, but other factors (including dust and genetics) can cause it as well.