When the movie dollies back to a wide shot of Alan doing his work with a large number of little screens in the background, one of the scenes on the left shows the supposed subject looking at a urinal. From there, the subject turns around and looks at a mirror, revealing a woman holding a camcorder.
The paper announcing Bannister's death states that he was 54 when he died. But, when Alan loads his implant for the first time, it states that there are 544,628 life hours to review. That number of hours would make him over 62 years of age.
When Bannister takes his daughter into his study, he closes the door. The visual record is shot along the length of his arm, so either his eyes are in the middle of his chest, or the camera was shooting from too low.
In the final shot of the movie, Alan is seen looking at himself in the mirror. He turns away and exits the frame and the scene ends. If the camera is in his eye, his field of vision would have changed, and even if the camera was just in his body, it would not have remained there as he exited the screen. This is a deliberate mistake by the filmmakers. DVD commentary verifies this is to have a poignant and ending and to throw the audience off at the last second.