GP Lens Institute Newsletter | Feb 25, 2022


This newsletter is kindly sponsored by:

Menicon Logo.png

Sclerals, Sclerals, Sclerals

In our February newsletter, we are emphasizing a very popular topic pertaining to a modality that changes people’s lives everyday: scleral lenses. Notably, our monthly webinar from Dr. Lynette Johns entitled “Scleral Lens Primer.” In my lifetime, I’ve never heard anyone address this topic better, and she did not disappoint. If you were not able to make the webinar, it is archived here. Dr. Johns was a long-time senior optometrist at Boston Foundation for Sight while also serving as an adjunct assistant professor in the department of specialty and advanced care at the New England College of Optometry. Most recently she has assumed the position as a research associate at the Harvard medical school department of ophthalmology. She is also co-author of the definitive text on scleral lenses: Contemporary Scleral Lenses: Theory and Application. We are also introducing a new column this month entitled “Clinical Pearls.” Maintaining the theme of scleral lenses, Dr. Matt Kauffman will share his pearls on this topic. A brief overview of our January quarterly student webinar, “Basics of Spherical Corneal GP Lens Design, Fitting, and Evaluation,” given by Dr. Marsha Malooley, will also be presented. Dr. Malooley is currently Director of Optometric Services at Chicago Cornea Consultants™ and a Diplomate in the American Academy of Optometry. Her webinar is archived here.


Scleral Lens Primer

Lynette Johns, OD, FAAO, FSLS, FBCLA

Dr. Johns emphasized that this webinar was just that – a primer for those individuals who are incorporating – or thinking of incorporating – scleral lenses into their practice. This included:

  • Indications of sclerals, notably for vision restoration, especially in ectatic and other forms of irregular cornea and for protection and lubrication in severe dry eye disease
  • Equipment: both minimum and desirable for fitting and evaluating scleral lenses
  • Solutions to be used with scleral lenses
  • Scleral lens anatomy and how that impacts the design and fit of a scleral lens
  • Evaluation of central and peripheral corneal clearance, limbal clearance, and the scleral landing zone and problems associated with too little or excessive clearance
  • Selecting lens diameter: the role of HVID
  • Sag height and scleral lens settling
  • Symmetric designs and their applications, evaluation, and documentation
  • Toric lens applications
  • Application of focal vaults, notches, and channels in cases of pinguecula and other abnormalities
Watch the Webinar


Basics of Spherical Corneal GP Lens Design, Fitting, and Evaluation

Marsha Malooley OD, FAAO, FSLS

In this presentations, Dr. Malooley addressed the following:

  • Why fit GPs
  • Who constitutes good spherical GP lens candidates
  • Lens Design including descriptions, inter-relationships and factors impacting how you determine values for:
  1. Overall/Optical Zone Diameter
  2. Base Curve Radius
  3. Peripheral Curve Radii/Widths
  • Basic concepts for power determination
  • Fluorescein pattern evaluation
  • Troubleshooting fitting relationships
  • Spherical GP fitting tips
  • Materials and their properties

Dr. Malooley also provided several practice problems and cases to help in understanding of GP lens design and power. In addition, this presentation was greatly enhanced with exceptional graphics depicting design changes as well as videos of the lens-to-cornea fitting relationships.

Watch the Webinar


Webinar Ad - Mar2022.png

The March webinar is kindly sponsored by:

Contamac and Acuity Polymers

March 15th

Enhancing Specialty Lenses Through Performance-Enhancing Drugs

by Mile Brujic, OD, FAAO

April 7th Student Webinar

The Nuts and Bolts of Orthokeratology

by Ariel Cerenzie, OD, FAAO, FSLS

April 19th

Incorporating Technology into Today’s Contact Lens Practice

by Barry Eiden OD, FAAO, FSLS

May 17th

Specialty Contact Lens Coding and Billing Update

by Clarke Newman, OD, FAAO, FBCLA, FSLS, FNAP

June 21st 

Spherical and Toric GP Lens Design, Fitting, and Problem-Solving

by Edward S. Bennett OD, MSEd, FAAO FSLS 

Learn More and Register


Scleral Lens Tools and Resources


To accompany Dr. John’s very informative webinar, we have a number of resources pertaining to scleral lenses which can be accessed here, as well as brochures and laminated cards available here. In particular, I would like to highlight our Scleral Lens Troubleshooting FAQs mini-book which is a comprehensive and well-illustrated guide on applications, lens design, fitting, problem-solving, and care. This was developed in cooperation with our friends from the Scleral Lens Education Society. Speaking of the SLS, we want to congratulate 2021 GPLI Educator of the Year Dr. Dan Fuller, who was recently elected President. Fellow GPLI Advisory Board members Drs. Rob Ensley and Matt Kauffman are now Vice-President and Treasurer respectively. Congratulations to outgoing President Dr. Maria Walker for a job well done, and we especially appreciated her assistance with the SLS-GPLI-AOA CLCS SCLERAL student workshop programs.

Order Printed Materials

Orders shipped to the US only - 200 of each complimentary including shipping



We have almost 3000 GP specialists with their area(s) of specialty listed to assist you when you need to refer a patient or for patients looking for a GP specialist as this resource is also available on our consumer site: If you are interested in signing up to be a referral GP lens practitioner, you can do so here

Specialties Include:

General GP Contact Lenses

Bifocal/Multifocal Contact Lenses

Contact Lenses for Irregular Corneas

Corneal Reshaping / Orthokeratology

Scleral Lens Designs

Submit Your Practice

Elevating Women in Eye Care

Sunday, March 20, 2022

6 hours of COPE approved CE

Online via Zoom

8:00 am - 1:00 pm PST

Cost: FREE

Register for Event



“I don’t know what I would do without these translating bifocal GPs. It improves my entire outlook on life, from family, to work, to recreation. When you can’t see or contact lenses don’t provide adequate vision, it is frustrating. To not have to deal with these problems is life changing.”  

– Michele Bivens

30 year practicing nurse


This month we are beginning a new column on clinical pearls to be authored by a GPLI Advisory Board member.

Matt Kauffman OD, FAAO, FSLS

Dr. Kauffman is Director of the Cornea and Contact Lens Clinic at the University of Houston College of Optometry where he is also involved in innovative clinical research pertaining to wavefront-guided scleral lens designs.


Additional time spent perfecting the scleral lens fit during the initial fitting process results in less chair time and fewer modifications and remakes later down the line.


Patients with irregular corneas may have elevated levels of higher order aberrations. Consider utilizing a wavefront aberrometer to measure residual aberrations over the scleral lens. Often vision may be improved with a sphero-cylindrical over-refraction.


Ensure patients have an adequate supply of scleral lens tools and accessories (e.g. filling solution, cleaning/disinfection solution, application/removal tools) as often these products are not easily available in local drug stores or grocery stores.


A single scleral lens design may not be ideal for every patient. Clinicians fitting scleral lenses should have at least several scleral lens design options of various parameters (e.g. diameter and geometry (prolate/oblate)).

About the GPLI


Edward S. Bennett, OD, MSEd, FAAO, FSLS

Professor Emeritus, University of Missouri St Louis College of Optometry

President and Executive Director, GP Lens Institute (GPLI)

The Gas Permeable Lens Institute is dedicated to providing eyecare professionals with unbiased educational and practice-building resources highlighting GP and custom manufactured soft contact lenses.

Please support the educational opportunities provided by the GP Lens Institute. We will continue to support all ECPs, staff and your patients. Be kind, respectful and find happiness within yourself!!

Thank you again to our newsletter sponsors

Menicon Logo.png


Facebook  Twitter  LinkedIn  Instagram
Support the GPLI