Question: Is it true that a T-Rex's vision is based on movement?
LorgSkyegon
6th Jul 2005
Jurassic Park (1993)
Answer: It's unlikely. As a large and top-heavy predator, the T. Rex would have needed excellent vision to be sure that it didn't fall over and injure itself. As it also had overlapping binocular vision (similar to predatory birds, predatory mammals, and humans), it most likely had very good vision, especially since prey freezing in place (like a deer in headlights) is a common thing. This is a holdover from the first book, which is also lampshaded as a bad theory in the second book.
Kent Stevens determined that T-rex had a depth perception of 55°. That's better than hawks and eagles.
22nd Jul 2010
Jurassic Park (1993)
Question: When Lex reboots the phones and Grant rings the bunker, how does Hammond immediately know it was Grant? Wouldn't it be more likely it was Ellie on the phone, or even Arnold?
Chosen answer: He was hoping it was Grant. He didn't want it to be Arnold or Ellie, who went to reset the breakers. He wanted it to be Grant - the one who was taking care of his grandchildren. He wanted to know they were OK.
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Answer: According to noted paleontologist Jack Horner, who acted as a consultant on this film, it is not known whether or not a T-Rex's vision was based on movement. However, because some reptiles do have this trait, Horner said it's possible that a T-Rex could have it as well, and he didn't object to it being in the movie. Being as these are not pure dinosaurs, it's plausible.
raywest ★
Kent Stevens conducted an experiment to figure out what kind of vision T-rex had.
There is evidence that T. Rex had excellent binocular vision, and could see you even if you didn't move.