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Iris segmentation is the most contested issue in the iris recognition system, since poor results of this stage will mar or break the iris recognition system effectiveness. Therefore, very careful attention has to be paid in the segmentation process if only an accurate result is expected; this depends on the accuracy of the detected pupil center. In this paper we proposed a new method to localize the center of the pupil which is concentric with the iris image by employing 8-neighbourhood operators. This parameter is then fed to a Circle Hough Transform to enhance iris segmentation processing speed and accuracy. The occlusions due to eyelids and eyelashes are detected by applying canny edge operator. The experiment is conducted using 320 iris images from CASIA standard dataset, and the result shows that the proposed method had a high accuracy rate.