The fact that the scene was not used in the movie might be because a lot of scenes in the movie really imply that he is definitely able to see and track objects with his eyes and also to aim and shoot, which would be nearly impossible without any kind of vision.
Also there is a scene where the T-800 approaches the T-1000 from behind and is able to ram a steel pole into his shoulder (the scene where the T-1000 tortures Sarah to make her scream for John). That scene strongly implies that the T-1000 has blind angles. That is also supported by the fact that the T-1000 can also turn into transparent materials. Therefore it´s quite reasonable that he actually shapes partly into fully functional cameras.
And there are many other scenes which support that theory, like when he asks around for John in the arcade and the kid points into the direction of the arcade machine John sits in. Or a scene very early in the movie, where the T-1000 basically scans his surroundings with a stare.
