vision: Defects of Vision

Defects of vision include astigmatism, color blindness, farsightedness, and nearsightedness. The absence of rods causes a condition known as night blindness; an absence of cones constitutes legal blindness.

Sections in this article:

• Introduction
• Defects of Vision
• Color and Stereoscopic Vision
• The Role of the Optic Nerve and Brain
• The Role of the Retina
• Vision in Humans
• Bibliography

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2024, Columbia University Press. All rights reserved.

See more Encyclopedia articles on: Anatomy and Physiology