Patent ID: 11903819
Assignee: ALCON INC.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 10:
11. The ophthalmic lens of claim 2, wherein Zbase corresponds to the base curvature and is described by the following equation:, Z
     base
    
    =
    
     
      
       
        c
        ⁢
        
         r
         2
        
       
       
        1
        +
        
         
          1
          -
          
           
            (
            
             1
             +
             k
            
            )
           
           ⁢
           
            c
            2
           
           ⁢
           
            r
            2
           
          
         
        
       
      
      +
      
       
        A
        4
       
       ⁢
       
        r
        4
       
      
      +
      
       
        A
        6
       
       ⁢
       
        r
        6
       
       ⁢
          
       where
       ⁢
          
       r
      
     
     ≥
     
      r
      3
     
    
   
   
  
  

 

wherein,
r denotes a radial distance from the optical axis of the optic,
c denotes a value of the base curvature,
k denotes a conic constant,
r3 denotes a radial distance from the optical axis to the third boundary,

A4 is a fourth order aspheric coefficient, and
A6 is a sixth order aspheric coefficient.