1: Optics for Opticians

optics for opticians prism

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!

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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.

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2: The Human Visual System

Where we stop and medical takes over.

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3: The (VERY) Basic Theory Of Light

How opticians need to think about light.

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4: Refractive Errors – Simple Myopia & Hyperopia

Explanation of the refractive errors of simple myopia & hyperopia.

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5: Refractive Errors – Simple Myopic & Hyperopic Astigmatism

Explanation of the refractive errors of simple myopic & hyperopic astigmatism.

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6: Refractive Errors – Compound Myopic & Hyperopic Astigmatism

Explanation of the refractive errors of compound myopic & hyperopic astigmatism.

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7: Refractive Errors – Mixed Astigmatism

Explanation of the refractive error of mixed astigmatism.

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8: Refractive Errors – Presbyopia

Explanation of the refractive error presbyopia.

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2: The Math & Science Behind Eyeglass Lenses

1: What is a Diopter?

Eyeglass prescriptions are written in a unit of measure called a diopter.

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2: Lenses as Prisms

All eyeglass lenses are just prisms.

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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.

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4: The Nominal Lens Formula

DL = D1 + D2

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5: What is Flat Transposition & How You Do It?

Flat transposition is how we convert a prescription written in one cylinder form to another.

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QUIZ: Flat Transposition Exercises
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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

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QUIZ: Optical Cross Exercises
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7: What is Snell’s Law & How Does It Work?

Snell’s Law allows us to measure refraction.

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3: Eyeglass Lens Types & Lens Materials

1: Lens Curves & Thickness

Sphere, aspheric, bi-aspheric, bi-concave, bi-convex.

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2: Two More Terms to Know When Talking About Lenses

Abbe, specific gravity

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3: Lens Materials

glass, plastic, mid, high, Trivex & Tribrids

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4: The Basics of Surfacing & Finishing Lenses

Two more terms to know.

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5: Free-Form Lens Design

Why DL = D1 + D2 doesn’t work anymore.

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6: Compensated Lens Design & Vertex Distance

Foundation to understanding compensated lenses.

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4: How Eyeglass Lenses Can Correct Poor Vision

1: Light Through Lenses

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

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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.

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3: Power & Meridians

To correct astigmatism a lens will have different power in different places.

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QUIZ: Power & Meridian Exercises
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4: Examples of Lenses Correcting Refractive Errors

Learn how different lenses are used to correct different refractive errors.

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5: Single Vision Lenses And Lined Multifocal Lenses

How do lenses and prescriptions compare?

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6: Progressive or PAL Lenses

How do lenses and prescriptions compare?

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7: Office, Mobile, Readers, & Occupational

How do lenses and prescriptions compare?

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QUIZ: Optics For Opticians
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