Slide show: A look inside your eyes
Illustration of the pupil, iris and sclera
Previous Next 2 of 5 The front of your eye

Viewing the front of your eye reveals three major parts, including the:

  • Sclera. This is the white part of your eye. It serves as a tough outer wall that helps protect its delicate internal structures.
  • Pupil. This is the dark spot at the center of the iris. It regulates the amount of light that enters your eye.
  • Iris. This is the colored part of your eye. It contains a ring of muscle fibers that expand or contract the size of your pupil and control the amount of light entering your eye.

A thin transparent tissue called the conjunctiva covers the sclera. Blood vessels visible in the white part of your eye are located within the conjunctiva.

See more Multimedia Feb. 22, 2014