About This Chapter
Anatomy & Disorders of the Eye - Chapter Summary
This chapter includes topics such as the anatomy of the eye, its parts and their functions along with a full explanation of how special cells transmit information from your eye to your brain. Learn about the different receptors of the eye and how they help you see with a lesson on cones, rods and the retina.
Our fun, short lessons also outline common conditions of the eye, such as color blindness, myopia and hyperopia, and their causes. This chapter will prepare you to:
- Explain how the lens of the eye allows clear vision
- Detail the structures of the eye and their purposes
- Understand how refraction is used to help you see
- Describe how depth perception works
Professional instructors have created the lessons found in this chapter, so you can be assured you are learning the most pertinent information in the very best way. Video lessons are often less than ten minutes long and can help those who learn more visually. Review all the lessons and quizzes in the chapter, or skip directly to the ones that correspond to the topics you know need more of your attention. Our instructors are available to help you if you have questions that you can't answer along the way.
1. Parts of the Eye and their Functions
Do you know the parts of the eye? If not, this lesson will help you to identify the parts of the eye and understand their specific functions. After learning about the eye, you will be able to test your knowledge with a quiz.
2. How Receptors of the Eye Conduct Information via the Optic Nerve
You will learn how your eyes are able to see the image in front of you thanks to special cells called photoreceptors. In addition, these receptors have very important proteins called rhodopsin and photopsin; and all of these things work together to transmit information to your optic nerve.
3. Lens of the Eye: Definition & Function
The lens of the eye focuses light and allows you to see. In this lesson, you will learn what the lens is made of and how it changes shape so that you can have clear vision.
4. Detailed Structures of the Eyeball
Your eyeballs are a lot like fluid-filled balloons wearing three coats or tunics. Structures within these tunics allow you to see colors, focus on objects, and see in dim light. Learn about the structures of the eyeballs and how they help you see.
5. Receptors of the Back of the Eye: Retina, Rods, Cones & Fovea
Find out how we see the world in color, what rods and cones are, and how camera film fits into all of this. In addition, you'll find out what the retina is and what gives you the ability to see at night.
6. What is Refraction? - Definition, Causes & Examples
Refraction of light is responsible for producing beautiful rainbows and is necessary for your eyes to work. In this lesson, learn how refraction works and how it helps you to see.
7. What is Color Blindness? - Causes & Overview
Humans have an incredibly sensitive and sophisticated visual system. Color blindness is a visual disorder characterized by a deficiency in color detection or processing. Here we explore several types of color blindness and their causes.
8. What Is Myopia? - Definition, Causes & Symptoms
Myopia is the medical term for nearsightedness. I, the writer of this fascinating lesson, am part of the 30% of Americans who are nearsighted. Read more to learn what causes this condition and what the specific symptoms are.
9. What Is Hyperopia? - Definition, Causes & Symptoms
Hyperopia is when someone sees objects that are far away more clearly than objects that are up close. Read this lesson to learn about hyperopia, what causes it, what the symptoms are, and how it can be treated.
10. What is Depth Perception? - Definition, Cues & Examples
How do our brains make 3-D images out of 2-D inputs? In this lesson, you'll explore various visual cues that require either one eye or both eyes. Prepare to look at depth perception in a new way.
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