| Chernoby    liquidators | Worgul et al. 2007 [12] | 
      
        | Number of subjects | 8607 | 
      
        | Mean age at exposure | 32.7 years | 
      
        | Mean age at eye examination | 44.9 years then 47 years | 
      
        | Time lag since exposure | 12 and 14 years | 
      
        | Median eye lens dose | 123 mGy    (94%<400 mGy) | 
      
        | Results | OR/1Gy=1.70 (1.22-2.38) (any type)
          OR/1Gy=1.42 (PSC)
          Not significant for CC
          Increased risk above 0.5 Gy
          Threshold: 0.34 to 0.5 Gy according to the type, maximum 0.7 Gy | 
      
        | Astronauts  | Cucinotta at al. 2001 [23] | Chylack et al. 2009 [25] | Rastegar et al. 2005 [24] | 
      
        | Number of subjects | 295 | 171 (control group=247) | 21 (control group=395) | 
      
        | Eye lens dose | 0.2-91 mSv | 15.1-129.3 mSv | - | 
      
        | Results | HR=3.73 (p=0.012) high doses
          Vs. low doses for PSC,     NC or mixed at 60 yrs.
          HR=3.44 for NC alone  at 65 yrs. |   Significant increase of CC (p=0.015)   | OR=3.02 (1.44-6.35) for NC | 
      
        | Airline pilots | Rafnsson et al. 2005 [26] | 
      
        | Number of subjects  | 79 pilots; 366 non pilots | 
      
        | Cumulated dose | 0 - 48 mSv | 
      
        | Results | Association with NC, not with tobacco or UVB; no eye lens dose;    doses>50 years not considered | 
      
        | Radiology technicians | Chodick et al. 2008 [27] | 
      
        | Number of subjects | 35,705 | 
      
        | Mean age at exposure | 24-44 years at inclusion | 
      
        | Mean age at eye examination | Followed for 20 years | 
      
        | Median eye lens dose | 28.1 mGy | 
      
        | Results | ERR/1Gy=1.98 (ns)
          HR high doses (60mGy) vs. low doses (5mGy) =1.18 (0.99-1.4) | 
      
        | Interventional cardiologists | Vano et al. 2010 [29] | Ciraj-Bjelac et al. 2010 [30] | 
      
        | Number of subjects | 58 IC; 93 NE | 56 IC; 22 NE | 
      
        | Mean age at  eye examination | IC=46 years; NE=41 years | IC=42 years; NE=44 years | 
      
        | Range     eye    lens dose | 0.1-27 Gy | 0.02-43 Gy | 
      
        | Results | OR for PSC=3.2 (38%vs 12%) | OR for PSC=5.7 (52% vs. 9%) |