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Peer-reviewed articles


Vincent,S. J., Cho,P., Yin Chan,K., Fadel,D., Ghorbani-Mojarrad,N., González-Méijome,J. M., Johnson,L., Michaud,L., Simard,P., Jones,L. CLEAR - Orthokeratology Contact Lens Anterior Eye 2021;44(2):240-269 [ Show Abstract ]

Orthokeratology (ortho-k) is the process of deliberately reshaping the anterior cornea by utilising specialty contact lenses to temporarily and reversibly reduce refractive error after lens removal. Modern ortho-k utilises reverse geometry lens designs, made with highly oxygen permeable rigid materials, worn overnight to reshape the anterior cornea and provide temporary correction of refractive error. More recently, ortho-k has been extensively used to slow the progression of myopia in children.

This report reviews the practice of ortho-k, including its history, mechanisms of refractive and ocular changes, current use in the correction of myopia, astigmatism, hyperopia, and presbyopia, and standard of care. Suitable candidates for ortho-k are described, along with the fitting process, factors impacting success, and the potential options for using newer lens designs. Ocular changes associated with ortho-k, such as alterations in corneal thickness, development of microcysts, pigmented arcs, and fibrillary lines are reviewed. The safety of ortho-k is extensively reviewed, along with an overview of non-compliant behaviours and appropriate disinfection regimens. Finally, the role of ortho-k in myopia management for children is discussed in terms of efficacy, safety, and potential mechanisms of myopia control, including the impact of factors such as initial fitting age, baseline refractive error, the role of peripheral defocus, higher order aberrations, pupil size, and treatment zone size.

Continuing Education Presentations


Barnett M, Fadel D, Gelles J, Sclafani L. Panel Discussion: International Keratoconus Academy (IKA) Session: New thoughts on keratoconus prevalence and its impact on clinical management The Summit of Specialty Contacts, Sorrento, Italy, Oct 14, 2022

Eiden B, Gelles J, Fadel D, Morgenstern A, Sclafani L, Sindt C. Workshop: Adapting to the new normal with scleral lens empirical design using advanced technology American Academy of Optometry, San Diego, 2022

Fadel D. “I did it my way”… How to fit without advanced technology The Summit of Specialty Contacts, Sorrento, Italy, Oct 16, 2022

Fadel D. Scleral lens fitting with Boston® materials CLASS Symposium 2022, Cartagena, Colombia, Nov 4, 2022

Fadel D. Scleral lenses: Procedure for correct fitting CLASS Symposium 2022, Cartagena, Colombia, Nov 3, 2022

Fadel D, Howard N. Panelist: British Contact Lens Association (BCLA): Pandemic Positives The Summit of Specialty Contacts, Sorrento, Italy, Oct 14, 2022

Fadel D, van der Worp E, Norvik Jervel A, Morgan P. Panel Discussion: Keratconus detection and its management with specialty contact lenses Specsavers Clinical Conference (Virtual), Copenhagen, Denmark, Oct 6, 2022

Professional Publications


Fadel D, Walsh K.. COVID-19, quando l'uso delle lenti è sicurio B2Eyes 2020;March. [ Show Abstract ]

Recentemente alcuni articoli di giornali sul possibile contagio da coronavirus tramite lenti a contatto e alcune organizzazioni sanitarie che consigliano il passaggio in questa fase agli occhiali anziché l’uso delle lenti a contatto sollevano facilmente la preoccupazione che l'utilizzo delle lac potrebbe non essere sicuro durante la pandemia da Covid-19. Questa inondazione di informazioni fuorvianti ha portato ricercatori di spicco nel panorama internazionale, da Canada, Regno Unito e Stati Uniti, a rispondere. Lyndon Jones, direttore del Center for Ocular Research & Education (CORE) presso l'Università di Waterloo (Canada), Philip Morgan, direttore di Eurolens Research presso l'Università di Manchester (Regno Unito), e Jason Nichols, vicepresidente associato di ricerca e docente all'Università dell'Alabama presso la Birmingham School of Optometry (Stati Uniti) e direttore editoriale di Contact Lens Spectrum, hanno fornito le seguenti informazioni sulla sicurezza dell'uso delle lenti a contatto.