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Chemical burns can happen if a solid or liquid chemical or chemical fumes get into the eye. Many substances will not cause damage if they are flushed out of the eye quickly. Acids and alkali substances can damage the eye. It may take 24 hours after the...
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Blurred vision is an ocular symptom. Causes There are many causes of blurred vision, including use of atropine. & Presbyopia -- difficulty focusing on objects that are close. Common in the elderly. Cataracts -- cloudiness over the eye's lens,...
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A nonproductive cough is dry and does not produce sputum. A dry, hacking cough may develop toward the end of a cold or after exposure to an irritant, such as dust or smoke. There are many causes of a nonproductive cough, such as: Viral illnesses. After...
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A productive cough produces phlegm or mucus (sputum). The mucus may have drained down the back of the throat from the nose or sinuses (postnasal drainage) or may have come up from the lungs. A productive cough generally should not be suppressed; it clears...
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A cough, in medicine, is a sudden and often repetitively occurring defence reflex which helps to clear the large breathing passages from excess secretions, irritants, foreign particles and microbes. The cough reflex consists of three phases: an inhalation...