Show Human Eye Iz Is the Most Susceptible to Injury The human eye cye is one of natures nature's finest instruments ins and one of oC the most delicate ones Normally stales states a writer in the Chicago Tribune it itis itis itis is used from the moment of birth until the hour of death except when its owner is sleeping It is not so keen as similar organs in certain other forms of life particularly in high flying birds but it performs when in normal condition adequate adequate- adequately ly for all of mans man's purposes Chief Chiel factors involved in seeing however are the optic nerve and the center in the brain for vision the retina which is the part of the eye that conveys images through the optic nerve the lens which is the focusing tissue the muscles which control the lens the iris which forms the outline of the pupil regulates its size and controls the I amount of light entering the eye I and the fluids which are necessary to the correct working of ot the mechanism The eyes are subject to many ail ailments ail ail- ailments ments and conditions that may ail I af af- affect affect affect vision Among adults over the age of forty fort farsightedness is very com com- mon The eyes may function prop prop- properly properly properly erly to about that age then the individual begins to have trouble reading although he sees objects clearly at a distance No organ of ot the body is so susceptible to injury as the eye ee A particle of dust or a cinder may set up infection which if not treat treat- treated treated treated ed immediately may imperil the sight Any foreign body lodging inthe in inthe inthe the eye can cause extreme fort I |