Chapter 18
Vision and Hearing
Although small, your eyes and ears are amazingly important
and complex organs. Do you know how your eyes and ears
work? Scientists have learned enough about these organs to
begin creating artificial eye and ear parts that might restore
vision and hearing to some people who have lost their ability
to see or hear. To do this, scientists and engineers must know
a lot about light and sound waves, as well as how the brain
works. Study this chapter to learn all about light and sound
waves, the brain, and even how different optical systems work
in addition to the structure and function of eyes and ears.
- What are the components of your nervous
system? - How do telescopes and human eyes work?
- How does the human ear work, and why can you
tell one voice from another, even when both say
the same word?