I will pretend that this is serious question and respond in kind.
I think your friend is confusing the fiction of Jurassic Park with the reality of what we actually know about T-Rex ophthalmic capabilities.
Since the T-Rex is, as some have pointed out, long extinct, we have no way of fully assessing their vision. We can learn a lot from bone fossils, but not enough to allow anything more than educated conjecture regarding how their vision actually functioned.
You might be interested to know that not all paleontologists agree that T-Rex was carnivorous. Some believe they primarily ate plants and carrion - which means that unless you were already dead, they would just ignore you. Of course, in this case, you would not want to stand still long enough for them to think you were actually dead.