With eye pain, there may be other symptoms too, which may help diagnose the cause of the discomfort. These include: 1  Conjunctivitis-red itchy eyes. 2  Tears. 3  Light sensitivity (photophobia). 4  Discharge, which can be clear, or thick and coloured (pus). 5  The eye being crusted shut after sleep due to discharge.
The process of breathing performs a number of important gas exchanges through inhalation and exhalation. When someone inhales, they contract and move their diaphragm, which allows the lungs to expand. This is a part of the process needed to psychically suck in the air. When a person exhales, the diaphragm relaxes and the movement is undone. This allows air to be gradually pushed out of the lungs.
As we increase our activity level the oxygen needs of the body increase, so our rate and depth of breathing is increased. It is possible to overexert ourselves to the point where we cannot inhale enough oxygen fast enough to meet the metabolic needs of the body, such that we are forced to stop and rest.any diseases affect our breathing, such as emphysema, which is a disease that makes gas exchange within the lungs very difficult and breathing to become labored. Bronchitis causes inflammation and mucous production, inducing fits of coughing.