emmetropia
noun
                                                                                                                            
                                                            em·me·tro·pia
                    
                                                                                                              
                                                                                                                                  ˌem-ə-ˈtrō-pē-ə  
                                                      
                                                          
            
                                
              
          
                                                      : the normal refractive condition of the eye in which with accommodation relaxed parallel rays of light are all brought accurately to a focus upon the retina   compare astigmatism, myopia                                      
                
                    
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  Merriam-Webster unabridged




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