Question

identify structures a, b and c. c has been magnified in the upper corner
this is an eyeball, sagittal section, showing parts of the eye with arrow a pointing to the anterior portion and arrow b pointing to a structure behind a, and arrow c pointing to an aperture.

Explanation:

To identify the structures of the eye:

• Structure A: Points to the anterior portion (front) of the eye. The cornea is the clear, anterior (front) structure of the eye, so A is the cornea.
• Structure B: Points to a structure behind A (cornea). The lens is located behind the cornea, so B is the lens.
• Structure C: Points to an aperture (opening). The pupil is the aperture (opening) in the iris that controls light entry, and the magnified view shows the iris/pupil region, so C is the pupil (or the aperture of the iris).

Answer:

• A: Cornea
• B: Lens
• C: Pupil (or Iris Aperture)