Dr. Edward Chow


Dr. Chow received his Doctor of Optometry from the University of Waterloo and has been in practice for 47 years. He is the first Canadian optometrist to engage in the practice of orthokeratology. As a renowned expert in myopia control and specialty contact lens fittings, Dr. Chow frequently lectures globally to present his extensive research on orthokeratology and myopia control. His goal is to help as many people as possible improve their eyesight and to share his knowledge with other eye care practitioners.
Dr. Chow is the owner and developer of the OrthoTool Custom Lens Design Software that has a US Patent approved Myopia Control Profile.

Dr. Edward Chow

Dr. Chow's research, published papers and posters, accomplishments, and industry involvement

Edward S. Chow, O.D., F.I.A.O., FAAOMC.

Educational Background:
Doctor of Optometry – University of Waterloo School of Optometry

National Eye Research Foundation (U.S.) since 1997
Orthokeratology Academy of America since 2007

Work Experience:
1973 – present       Chow Eye Institute group practice
Engaged in specialty contact lens fittings/ RGP and orthokeratology studies and research.
1973-1974:  Laboratory instructor in physiological Optics at the School of Optometry, University of Waterloo

Lecturing in specialty contact lens fitting and orthokeratology at the annual educational meetings:

  • Little Rock, Arkansas 2006
  • University of Houston, Houston 2007
  • San Diego 2008
  • Phoenix 2009

Lecturing in orthokeratology in Hong Kong, China, Japan and at the School of Optometry, University of Waterloo.

Two papers accepted at the Global Orthokeratology Symposium 2002:

  1. Orthokeratology & IOP
  2. Orthokeratology through Nigh Therapy and the Long Term Corneal Cell Changes

Poster accepted at the Global Orthokeratology Symposium 2004:
Long Term Clinical Results of Overnight Orthokeratology Lens Wear Using Controlled Tear Film Thickness Design Method

Winner of first place for the poster competition at the 2005 Annual Global Orthokeratology Symposium: "Orthokeratology: The Days after Tomorrow"

Posters presented at the Specialty Lens Symposium:

  1. Daytime wear of Aspheric Lenses for Orthokeratology Effect: Managing Refractive Anomalies & Irregular Corneas with Aspheric Lens (2009)
  2. The Role of Orthokeratology Lens Design in Myopia Control (2014)

Lecture presented at the Global Specialty Lens Symposium, 2012:
Orthokeratology & Myopia Control: Understanding the Peripheral Defocus & Hydrodynamic Principle

Recipient of  the Orthokeratology Academy of America Achievement Award 2007

Lectures presented at the Annual Meeting of the Contact Lens Association of Ophthalmologists:

  1. Controlled Tear Film Thickness Principle with Orthokeratology (2004)
  2. Myopia Control in Clinical Practice (2014)

Poster presented at the Annual Meeting of the Contact Lens Association of Ophthalmologists (CLAO) 2014:

The Role of  Orthokeratology Lens Design in Myopia Control

Poster presented at the annual American Academy of Optometrists Symposium (AAO), 2008:
Long Term Orthokeratology Effect after Discontinuation based on Axial Length Change

Lecture presented at the annual American Academy of Optometrists Symposium (AAO):

  • Anaheim, California, 2008
    • Aspheric Orthokeratology: Managing Refractive Anomalies with Gas Permeable Lenses with Illustrations
  • San Francisco, California, 2010
    • Myopia Control: Practical Applications of Retinal Defocus Theory with Reverse Geometry & Aspheric Multifocal Lenses
  • Denver Colorado, 2014
    • Effective Myopia Control in Clinical Practice
  • New Orleans, 2015
    • Effective Myopia Control Lens Design in Clinical Practice
  • Chicago 2017
    • Modern Orthokeratology for Effective Myopia Control: Understanding The Forces & Basic Optics behind Custom Lens Design

Scientific papers published:

  1. A Study of the Central and Peripheral Refractive Power of the Cornea with Orthokeratology Treatment. International Contact Lens Clinic, Vol.21, July 1994; 132-135  (co-author: Dr. George Woo)
  2. A Study of Central and Peripheral Keratometric findings of Asian and Caucasians. Practical Optometry 1994;5(1):36-37  (co-author: Dr. George Woo)
  3. Corneal Curvature Findings Recorded by the EyeSys Corneal Analysis System
    Model 3 (CAS3), Practical Optometry 9:5, 1998; 174-176 (co-Author George Woo)
  4. Orthokeratology: The Days after Tomorrow. Clinical & Refractive Optometry (Canada) 19:5, 2008; 153-156


Canadian Association of Optometrists
Ontario Association of Optometrists
Contact Lens Society of America
Contact Lens Association of Ophthalmologists
Orthokeratology Academy of America (Board of Directors 2007-2017)
Optometric Nutrition Society