Questions

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=Questions:=
 * 1) ==What is the function of retina?==
 * 2) ==What type of lenses are used to correct**** farsightedness? ****==
 * 3) ==**** What is astigmatism? ****==
 * 4) ==Why ****cornea behaves like camera’s lens?****==
 * 5) == What is responsible for the eye colo r?==