Diagnosis
Anisometropia causes some people to have mild vision problems, or occasionally more serious symptoms like alternating vision or frequent squinting. However, since most people do not show any clear symptoms, the condition usually is found during a routine eye exam.For early detection in preverbal children, photoscreening can be used. In this brief vision test specialized cameras detect each eyes light reflexes, which the equipments software or a test administrator then interprets. If photoscreening indicates the presence of risk factors, an ophthalmologist can then diagnose the condition after a complete eye exam, including dilating the pupils and measuring the focusing power of each eye. Treatment
Spectacle correction
For those with large degrees of anisometropia, the wearing of standard spectacles may cause the person to experience a difference in image magnification between the two eyes (aniseikonia) which could also prevent the development of good binocular vision. This can make it very difficult to wear glasses without symptoms such as headaches and eyestrain. However, the earlier the condition is treated, the easier it is to adjust to glasses. It is possible for spectacle lenses to be made which can adjust the image sizes presented to the eye to be approximately equal. These are called iseikonic lenses. In practice though, this is rarely ever done.
Then for the second eye the magnification would become 
  
    
      
        
          
            Magnification
          
        
        =
        
          
            1
            
              (
              1
              −
              (
              0.005
              
                /
              
              1.6
              )
              ×
              14.5
              )
            
          
        
        ⋅
        
          
            1
            
              (
              1
              −
              0.015
              ×
              −
              4
              )
            
          
        
        =
        1.0475
        ×
        0.9434
        =
        0.9882
        =
        98.82
        
        %
      
    
    {\displaystyle {\textrm {Magnification}}={\frac {1}{(1-(0.005/1.6)\times 14.5)}}\cdot {\frac {1}{(1-0.015\times -4)}}=1.0475\times 0.9434=0.9882=98.82\,\%}
  ,
which is much closer to that of the first eye.