With proper cure of water, it is feasible to reduce water pollutants. In todays world, sewage water pollution is one of matlab programming major problems faced by most cities. This sort of pollutants results in health related and environmental issues. With proper treatment of water, it is feasible to reduce water pollution. Pollution caused by sewage water is one of matlab programming major problems in cities matlab programming world over. Sewage water is drained off into rivers without treatment. Canny edge detection , that’s regarded as one of matlab programming leading strategies to detect edges, is then applied to detect matlab programming edges of matlab programming eye image. Canny edge detection, consists of three main suggestions Gaussian filter , non max suppressions NonMaxSup and hysteresis thresholding Hysthresh . After making use of a few experiments using matlab programming canny edge detection characteristic, it has been followed that matlab programming best values for matlab programming parameters to generate edge images are matlab programming ones shown in Table 3. The gamma values for canny edge detection are also shown in Table 3. The gamma value is part of matlab programming adjust Gamma adjgamma characteristic that changes matlab programming comparison of a picture. After making use of canny edge detection, matlab circular Hough remodel CHT technique is utilized with a purpose to extract matlab programming iris and pupil, as shown in Fig.