1: Optics for Opticians

optics for opticians prism
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First Of All – Don’t Panic!

You Have To Start Somewhere!

Some guy said, “The journey of a thousand miles begins with one step.” A wise man once said, “The journey of a thousand miles begins with one step while the journey is only completed when we keep on stepping.” So just keep on stepping!

Course Information

Estimated Time: 8 - 16 Hours

Difficulty: Difficult

Course Instructor

John Seegers John Seegers Author

Introduction to OpticianWorks

Introduction to OpticianWorks: READ ME!

Please read me first!

1: Why People Wear Glasses & The Common Refractive Errors

1: Why Do People Wear Glasses?

Explanation of why some people need to wear glasses to see clearly.
2: The Human Visual System

Where we stop and medical takes over.
3: The (VERY) Basic Theory Of Light

How opticians need to think about light.

4: Refractive Errors – Simple Myopia & Hyperopia

Explanation of the refractive errors of simple myopia & hyperopia.
5: Refractive Errors – Simple Myopic & Hyperopic Astigmatism

Explanation of the refractive errors of simple myopic & hyperopic astigmatism.
6: Refractive Errors – Compound Myopic & Hyperopic Astigmatism

Explanation of the refractive errors of compound myopic & hyperopic astigmatism.
7: Refractive Errors – Mixed Astigmatism

Explanation of the refractive error of mixed astigmatism.

8: Refractive Errors – Presbyopia

Explanation of the refractive error presbyopia.

2: The Math & Science Behind Eyeglass Lenses

1: What is a Diopter?

Eyeglass prescriptions are written in a unit of measure called a diopter.
2: Lenses as Prisms

All eyeglass lenses are just prisms.
3: Where Does “n” the Index of Refraction Come From?

The material a lens is made from has an index of refraction. The abbreviation for an index is n.
4: The Nominal Lens Formula

DL = D1 + D2
5: What is Flat Transposition & How You Do It?

Flat transposition is how we convert a prescription written in one cylinder form to another.
QUIZ: Flat Transposition Exercises
6: The Optical Cross – How You Work With It & The Lens Clock

The optical cross is a graphical representation of the powers found on a lens
QUIZ: Optical Cross Exercises
7: What is Snell’s Law & How Does It Work?

Snell’s Law allows us to measure refraction.

3: Eyeglass Lens Types & Lens Materials

1: Lens Curves & Thickness

Sphere, aspheric, bi-aspheric, bi-concave, bi-convex.
2: Terms to Know When Talking About Lenses

Abbe, specific gravity
3: Lens Materials

glass, plastic, mid, high, Trivex & Tribrids
4: The Basics of Surfacing & Finishing Lenses

Two more terms to know.
5: Free-Form Lens Design

Why DL = D1 + D2 doesn’t work anymore.
6: Compensated Lens Design & Vertex Distance

Foundation to understanding compensated lenses.

4: How Eyeglass Lenses Can Correct Poor Vision

1: Light Through Lenses

You will become a bender of light. That is an optician.

2: What is an Axis & What is Astigmatism?

When a person’s cornea has two different curves on it we say that person has an astigmatism.
3: Power & Meridians

To correct astigmatism a lens will have different power in different places.
QUIZ: Power & Meridian Exercises
4: Examples of Lenses Correcting Refractive Errors

Learn how different lenses are used to correct different refractive errors.
5: Single Vision Lenses And Lined Multifocal Lenses

How do lenses and prescriptions compare?
6: Progressive or PAL Lenses

How do lenses and prescriptions compare?
7: Office, Mobile, Readers, & Occupational

How do lenses and prescriptions compare?
QUIZ: Optics For Opticians