Why don't cameras have two lenses like human eyes?

It all depends on why you need two lenses, or cameras. I'll try to make this answer fun and visual. read more

The reason normal cameras don’t have two lenses like the human eyes is because cameras don’t tend to take 3D pictures or films (and even if a film has been recorded on a non-3D camera it can be converted to 3D). read more

Because we move. Successful navigation depends on having effective sensory apparatus. We had to protect ourselves against other animals that could navigate well. Luckily, we shared a common two-eyed ancestor with many of these animals, and so we had two eyes from the start. read more

The Eye as a Camera System. Superficially, its pretty logical to compare the eye to a camera. We can measure the front-to-back length of the eye (about 25mm from the cornea to the retina), and the diameter of the pupil (2mm contracted, 7 to 8 mm dilated) and calculate lens-like numbers from those measurements. read more