Patent ID: 11903648
Assignee: UNITED KINGDON RESEARCH AND INNOVATION
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 11:
12. The method of claim 11, wherein the step of computing the optical density is calculated as:, OD
      visualpigment
    
    ⁡
    
      (
      λ
      )
    
  
  =
  
    0.5
    ⁢
    
      
    
    ⁢
    log
    ⁢
    
      
    
    ⁢
    10
    ⁢
    
      (
      
        
          
            
              R
              
                b
                ⁢
                l
                ⁢
                e
                ⁢
                a
                ⁢
                c
                ⁢
                h
                ⁢
                e
                ⁢
                d
              
            
            ⁡
            
              (
              λ
              )
            
          
          -
          
            
              R
              
                s
                ⁢
                c
                ⁢
                a
                ⁢
                t
              
            
            ⁡
            
              (
              λ
              )
            
          
        
        
          
            
              R
              
                d
                ⁢
                a
                ⁢
                r
                ⁢
                k
                ⁢
                a
                ⁢
                d
                ⁢
                a
                ⁢
                p
                ⁢
                t
                ⁢
                e
                ⁢
                d
              
            
            ⁡
            
              (
              λ
              )
            
          
          -
          
            
              R
              
                s
                ⁢
                c
                ⁢
                a
                ⁢
                t
              
            
            ⁡
            
              (
              λ
              )
            
          
        
      
      )
    
  

where OD(λ) is the optical density as a function of wavelength, Rbleached(λ) is the reflectance spectrum from a bleached eye as a function of wavelength, Rdarkadapted(λ) is the reflectance spectrum from a dark-adapted eye as a function of wavelength, and Rscat(λ) is the scattering spectrum as a function of wavelength.