Final answer:
The pupillary axis is a line that intersects perpendicularly with the center of curvature of the anterior surface of the cornea. It is used to observe certain characteristics of the eye.
Step-by-step explanation:
The line that intersects perpendicularly the center of curvature of the anterior surface of the cornea is called the pupillary axis. This line is used to observe certain characteristics of the eye.
Rays of light entering the eye are refracted toward the central axis, causing them to meet at the focal point on the retina. This phenomenon occurs because the cornea, aqueous humor, and lens of the eye have smaller refractive indices compared to air.
The pupillary axis is an important concept in understanding how light enters and focuses on the retina of the eye.