About this course

Orthokeratology Fundamentals will guide you through the theoretical and practical foundation to get started with your first few orthokeratology (OK) fits. Specifically designed for the new fitter, this course will set you up for success and build your confidence in fitting OK lenses.

You will first learn how OK works and the changes that these lenses make to the eye during overnight wear. With this knowledge under your belt, you’ll be guided through selecting your first patient; the clinical measurements that you should take and their interpretation to select the best lens to fit; dispensing and assessment of lens fit and eye health at follow up visits.

Learner Outcomes

Patient Care
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Feel more confident fitting and managing orthokeratology
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Met their self-identified learning goals

Course Details

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Downloadable Resources
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100% Online
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Completion Certificate
Self Paced
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Self Paced Learning
Graded Quizes
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Graded Quizzes


  • NZ: 6G points, ODOB course 50238
  • US, CA: 6 COPE approved hours, Course ID 69926-CL, Activity ID 121147
  • AU: 6 self-recorded CPD hours
  • UK: 6 hours, 6 CPD points for points for Optometrists, Dispensing Opticians and Contact Lens Opticians. C-100099 & C-100100
  • AU: 6 CPD hours, Event ID 90003601


Staff Avatar Image

Dr Paul Gifford PhD

Instructor rating:

What you will learn

Ch 1: Welcome to Orthokeratology Fundamentals

4 Lessons
  • Welcome to Orthokeratology Fundamentals! Here's what you will learn.
  • Disclosures
  • How to use this course
  • Your continuing education

Ch 2: Important background knowledge

In this chapter you will learn how OK has evolved from fitting PMMA contact lenses as an attempt to alter corneal shape, to correcting refractive error into modern reverse geometry designs that provide accelerated effect during overnight wear. Types of OK lens design are covered alongside who you should and should not fit with OK.

7 Lessons
  • The history of OK
  • How OK works
  • Time course of changes
  • Types of OK lens design
  • Why fit OK
  • Downloadable summary 1
  • Test your learning 1

Ch 3: Corneal topography

OK lenses correct refractive error by temporarily altering corneal topography, which makes measuring and analyzing corneal topography an important skill for you to master. In this chapter you will learn how corneal topography works; tips to capture the best quality topography image; and how to analyze topography maps.

6 Lessons
  • Introduction to corneal topography
  • Capturing awesome topography images
  • Demonstration of corneal topography capture
  • Understanding topography maps
  • Downloadable summary 2
  • Test your learning 2

Ch 4: Limitations of OK, patient selection and lens fitting procedure

This chapter builds on the first two chapters to understand how baseline corneal topography and refractive error influence lens fit, and the limits of correction that can be achieved from OK. You will then learn the steps to follow to select a first lens, its dispensing and instructions to provide your patient for their first night of lens wear.

9 Lessons
  • Limits of refraction
  • Essential topography measures
  • Corneal toricity
  • Other factors and patient selection summary
  • Lens fit
  • Dispensing and instruction
  • Lenses dispensed - next up, assessment after the first night of wear
  • Downloadable summary 3
  • Test your learning 3

Ch 5: First night follow up

The response from the first night of lens wear can be variable, making the first follow-up visit more about ensuring your patient is proficient in lens handling than assessing lens fit and refraction outcomes. In this chapter you will learn what to expect and how to manage the different presentations, and how to manage shortfall in refraction correction while the OK effect improves over the next few days of lens wear.

8 Lessons
  • Procedure after the first night of lens wear
  • Managing corneal staining
  • Managing refraction outcomes
  • Corneal topography difference map assessment
  • Demonstration cases: initial lens fit and first night follow up
  • First night accomplished, now to prepare for the one week follow up
  • Downloadable summary 4
  • Test your learning 4

Ch 6: One week follow up

By one week of wear the full OK effect is expected, requiring you to understand the topography map patterns that represent different lens fit outcomes. Each map type is analysed in detail in this chapter, including description of the map characteristics that define each pattern type and advice on how to modify lens fit to improve fit and refraction outcomes.

15 Lessons
  • One week follow up procedure
  • Optimal fit - Bullseye and variations
  • Steep fits - Central Islands
  • Flat fits - Smiley & Frowney faces
  • Lateral decentration
  • Managing NaFl staining at one week
  • Managing refraction at 1-week
  • Changing lens fit for refraction
  • Next steps
  • Downloadable summary 5
  • Introduction to demonstration cases
  • Demonstration - Bullseye
  • Demonstration - Pseudo Frowney Face
  • Demonstration - Central Island
  • Test your learning 5

Ch 7: One month and beyond

With your patient now established in OK, your attention shifts to long term management. In this chapter you will learn when your patient should return for follow-up appointments, and the procedure to follow at these visits to maintain long term success from OK lens wear, alongside maximizing safety and ensuring continued good eye health.

8 Lessons
  • Long term follow up visit procedure
  • Assessing changes to refraction
  • Managing long term refraction
  • Assessing corneal topography over the long term
  • Long term effects of orthok, safety and eye health
  • Orthok lens care and replacement
  • Downloadable summary 6
  • Test your learning 6

Ch 8: Next steps

1 Lesson
  • Congratulations! You did it! Here's what's next.

Course Reviews

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61 reviews
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90.16% are 5-star reviews.
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9.84% are 4-star reviews.
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0% are 3-star reviews.
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0% are 2-star reviews.
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0% are 1-star reviews.

Individual reviews

Review stars

Great course

By Claire R - 18 days ago

Even though we are already fitting, still learnt alot

Review stars

Fantastic overview of Ortho K

By Chris G - one month ago

For someone brand new to ortho K and not a doctor, I found this course to be very helpful in understanding the concept of OK as well as basic parameters of the treatment.

Review stars

Beneficial for anyone doing ortho k fitting

By Anka L - 2 months ago

This course has really helped me understand the concepts of ortho k, the problem solving and the process of fitting. I feel more confident in looking after my patients now

See all 61 reviews

Free to Enroll for First Chapter

  • Course video lessons
  • Text summaries of video content
  • Downloadable reference infographics
  • Graded quizzes to test your learning
  • Completion certificate
  • Self-paced learning
  • Feedback on graded quiz options

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Reduced course fee available for low income countries

Frequently Asked Questions

  • Is this course eligible for continuing professional educational credits?

    This couse has achieved continuing accrediation in:

    • NZ: 6 hours 6G points, ODOB course 50238
    • US, CA: 6 hours 6 COPE approved hours, Course ID 69926-CL, Activity ID 121147
    • AU: 6 hours 6 self-recorded CPD hours
    • UK: 6 hours 6 hours, 6 CPD points for points for Optometrists, Dispensing Opticians and Contact Lens Opticians. C-100099 & C-100100
    • AU: 6 hours 6 CPD hours, Event ID 90003601

    On completion, we will provide a certificate to you for self-recorded continued professional development purposes, which includes the duration of the course and continuing accreditation details for specific countries. We will also provide post-course administration to accrediting bodies where required. Check your country's requirements regarding continuing education.

  • When does the course start and finish?

    The course is available now and never ends! It is a self-paced online course - you decide when you start, and set your own pace.

  • How long do I have access to the course?

    After enrolling you will have unlimited access to this course for as long as you like - across any and all devices you own.