TruForm Optics
  
  Vertex Conversion Chart
  
    
      | minus | 
        | 
      plus | 
        | 
      minus | 
        | 
      plus | 
    
    
      | -3.87D | 
      4.00D | 
      +4.25D | 
        | 
      -8.50D | 
      9.50D | 
      +10.75D | 
    
    
      | -4.00D | 
      4.25D | 
      +4.50D | 
        | 
      -8.75D | 
      9.75D | 
      +11.00D | 
    
    
      | -4.25D | 
      4.50D | 
      +4.75D | 
        | 
      -8.87D | 
      10.00D | 
      +11.37D | 
    
    
      | -4.50D | 
      4.75D | 
      +5.00D | 
        | 
      -9.37D | 
      10.50D | 
      +12.00D | 
    
    
      | -4.75D | 
      5.00D | 
      +5.25D | 
        | 
      -9.75D | 
      11.00D | 
      +12.75D | 
    
    
      | -5.00D | 
      5.25D | 
      +5.62D | 
        | 
      -10.12D | 
      11.50D | 
      +13.37D | 
    
    
      | -5.12D | 
      5.50D | 
      +5.87D | 
        | 
      -10.50D | 
      12.00D | 
      +14.00D | 
    
    
      | -5.37D | 
      5.75D | 
      +6.12D | 
        | 
      -10.87D | 
      12.50D | 
      +14.75D | 
    
    
      | -5.62D | 
      6.00D | 
      +6.50D | 
        | 
      -11.25D | 
      13.00D | 
      +15.50D | 
    
    
      | -5.75D | 
      6.25D | 
      +6.75D | 
        | 
      -11.62D | 
      13.50D | 
      +16.12D | 
    
    
      | -6.00D | 
      6.50D | 
      +7.00D | 
        | 
      -12.00D | 
      14.00D | 
      +16.75D | 
    
    
      | -6.25D | 
      6.75D | 
      +7.37D | 
        | 
      -12.37D | 
      14.50D | 
      +17.50D | 
    
    
      | -6.50D | 
      7.00D | 
      +7.62D | 
        | 
      -12.75D | 
      15.00D | 
      +18.25D | 
    
    
      | -6.62D | 
      7.25D | 
      +8.00D | 
        | 
      -13.00D | 
      15.50D | 
      +19.00D | 
    
    
      | -6.87D | 
      7.50D | 
      +8.25D | 
        | 
      -13.50D | 
      16.00D | 
      +19.75D | 
    
    
      | -7.12D | 
      7.75D | 
      +8.50D | 
        | 
      -13.75D | 
      16.50D | 
      +20.50D | 
    
    
      | -7.25D | 
      8.00D | 
      +8.87D | 
        | 
      -14.12D | 
      17.00D | 
      +21.50D | 
    
    
      | -7.50D | 
      8.25D | 
      +9.12D | 
        | 
      -14.50D | 
      17.50D | 
      +22.25D | 
    
    
      | -7.75D | 
      8.50D | 
      +9.50D | 
        | 
      -14.75D | 
      18.00D | 
      +23.00D | 
    
    
      | -7.87D | 
      8.75D | 
      +9.75D | 
        | 
      -15.12D | 
      18.50D | 
      +23.75D | 
    
    
      | -8.12D | 
      9.00D | 
      +10.12D | 
        | 
      -15.50D | 
      19.00D | 
      +24.75D | 
    
    
      | -8.37D | 
      9.25D | 
      +10.37D | 
        | 
      -16.00D | 
      20.00D | 
      +25.25D |