| Astigmatism    in
            diopter | 
        Preoperative | 
        4    to 6 weeks follow-up | 
       
      
        | Base    hospital | 
        Surgical    eye camps | 
        Base    hospital | 
        Surgical    eye camps | 
       
      
        |   | 
        n    (%) | 
        n    (%) | 
        n    (%) | 
        n    (%) | 
       
      
        | <0.5 | 
        24    (10.9) | 
        20    (9) | 
        4    (2.3) | 
        5 (3.8) | 
       
      
        | 0.5    - 1.0 | 
        99    (44.8) | 
        115    ( 51.3) | 
        24    (13.6) | 
        16    (12.3) | 
       
      
        | 1.25    - 2.0 | 
        72    (32.6) | 
        71    (31.7) | 
        68    (38.6) | 
        39    (30) | 
       
      
        | 2.25    - 3.0 | 
        21    (9.5) | 
        15    (6.7 | 
        55    (31.3) | 
        38    (29.2) | 
       
      
        | >  3.25  | 
        5    (2.3) | 
        3    (0.9) | 
        25    (14.2) | 
        32    (24.6) | 
       
      
        | Total | 
        221    (100) | 
        224    (100) | 
        176    (100) | 
        130(100) | 
       
      |