Name:
Class/ Period:
How Is the Human Eye Similar to a Camera? Label the parts.
The ________________ is the part of the eye that is clear and serves two functions: to keep dirt and debris from
entering into the inner eye and acts like an outer lens to focus and control light entering the eye.
Film uses silver halide crystals to gather light and form an image. The eye uses the ________________________
to translate light into a visual message.
Another part of the eye that regulates light is called the ___________________. It works that same as a camera
lens’ _______________________________, which opens and closes to regulate light. This part of the eye has
color and is also a sphincter muscle.
The __________________________________ carries visual messages from the retina to the brain. It has over
one million nerves and is similar to the USB cable on digital cameras.
The ________________________ is clear and focuses light on the retina by refraction. This part of the eye is
flexible, allowing it to focus on objects close up or far away.
Thick, clear jelly that gives the eye it’s shape is called the ___________________________________________.
The dark center in the eye is called the ____________________________. It’s size is controlled by the iris.
The eyelid works like the camera _____________________________. It opens and closes quickly or slowly to
allow more or less light in.
The tough, outer covering of the eye is called the _______________________. It protects the inner eye from the
external environment.
The literal meaning of “photography” is to ____________________________ with ______________________.
Bonus question!
The first camera, called the ________________________________________, was originated in ancient times.
Give a brief description of how it worked: