Light enters at the thinner, bottom end of the lens and bounces around until reaching the desired Angle and emerging from the front of the lens.
光线在确定合适角度以后,经透镜底部较薄处折射后从透镜前端发出。
2
When placed in front of an LCD, the screen creates a sense of depth using the parallax effect (each eye views an object from a slightly different Angle).
The car has a big piece of glass just in front of the steering wheel with the bonnet sitting in the lions' enclosure, but from the right Angle, it looks like there is no glass.