Faculty profile

Sherif El-Defrawy

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ProfessorDepartment of OphthalmologyUniversity of Toronto

Sherif El-Defrawy

Professor

Department of Ophthalmology

University of Toronto

Toronto, Ontario, Canada

Supervision signals

Professors usually supervise graduate students in their department's programs.
8 publications in the last five years, latest in 2026.
Principal investigator on 4 research grants (4 CIHR), most recently in 2022.

These signals come from public records, including federal and provincial funding decisions. Ask the professor or the graduate program whether they are taking new students.

Academic metrics

Publications

194

Citations

Collaborators

Grants

Publications by year

Counts cover the publications linked to this profile. Citations and the h-index appear when the source records them.

Profiles and links

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Signals and details

Research

Read how they describe their research on their University of Toronto profile.

Latest papers

Contrasting approaches to estimate the epidemiology of uveitis in Canadian health administrative data.
Canadian journal of ophthalmology. Journal canadien d'ophtalmologie · 2026
Assessing the impact of ophthalmology locum clinic rotation in Northeastern Ontario.
Canadian journal of ophthalmology. Journal canadien d'ophtalmologie · 2026
Documenting the subjective patient experience of first vs second eye during immediately sequential bilateral cataract surgery.
Journal of cataract and refractive surgery · 2026

All 20 publications

Latest funding

Planning for an international symposium on patient/physician shared decision making for cataract surgery appropriateness and prioritization
CIHR · 2022 · Principal investigator
$9,970
Setting the foundation for the development of a patient- and provider-informed cataract surgery care model
CIHR · 2021 · Principal investigator
$99,774
Comparative effectiveness of newer oral diabetes medications in preventing advanced diabetic retinopathy
CIHR · 2019 · Co-investigator
$130,000

All 9 grants and awards

20 publications.

Contrasting approaches to estimate the epidemiology of uveitis in Canadian health administrative data.

Felfeli T, Palma L, Rosella L, El-Defrawy S, Albini T, Mandelcorn ED, Widdifield J

Canadian journal of ophthalmology. Journal canadien d'ophtalmologie20261 citationsOpen Access

DOI: 10.1016/j.jcjo.2025.08.015 PMID: 40921418

Assessing the impact of ophthalmology locum clinic rotation in Northeastern Ontario.

Larche CL, Oliver A, Rai AS, El-Defrawy S, Rai AS

Canadian journal of ophthalmology. Journal canadien d'ophtalmologie2026

DOI: 10.1016/j.jcjo.2025.10.003 PMID: 41183787

Documenting the subjective patient experience of first vs second eye during immediately sequential bilateral cataract surgery.

Balian C, Teplitsky JE, Nassrallah W, Sayal A, Braga-Mele R, El-Defrawy S, Rai AS, Lloyd J, Rai AS

Journal of cataract and refractive surgery2026

DOI: 10.1097/j.jcrs.0000000000001755 PMID: 40760422

Association of rural or urban status, region, and institution type with cataract surgery wait times in Ontario, Canada

Huixin Anna Zhang, Marko M. Popovic, Nishaant Bhambra, Mack Hurst, Lori M. Diemert, Casey Chu, Mike Yang, Sherif R. El-Defrawy, Iqbal Ike K. Ahmed, Laura C. Rosella, Matthew B. Schlenker

Canadian Journal of Ophthalmology2025Open Access

DOI: 10.1016/j.jcjo.2025.08.004 PMID: 40876807

Prevalence of glaucoma in Canada: results from the 2016–2019 Canadian Health Measures Survey

Ya-Ping Jin, Kiko Zi Yi Huang, Qingqing K Zhao, Graham E. Trope, Yvonne M. Buys, Sherif R. El-Defrawy, Peng Yan, Michael Henry Brent, Ziad Butty

Canadian Journal of Ophthalmology20243 citationsOpen Access

DOI: 10.1016/j.jcjo.2024.08.016 PMID: 39313018

Multi-center validation of Catquest-9SF visual function questionnaire in Ontario, Canada

Kabanovski A, Shah B, D’Silva C, Ma J, Minotti SC, Qian J, Hatch W, Reid R, Chaudhary V, El-Defrawy S

PLoS ONE20234 citationsOpen Access

DOI: 10.1371/journal.pone.0278863

Preoperative evaluations for ophthalmic surgery: A systematic review of 48,869 eyes

Verina Hanna, Marko M. Popovic, Sherif R. El-Defrawy, Matthew B. Schlenker, Ravin Alaei, Peter J. Kertes

Survey of Ophthalmology20223 citations

DOI: 10.1016/j.survophthal.2022.12.004 PMID: 36572226

Patient Satisfaction and Visual Function Following Implantation of Trifocal or Extended Range of Vision Intraocular Lenses.

Britton JJL, El-Defrawy S, Wong BM, Chandrakumar M, Omali NB, Pham S, Hatch W

Clinical ophthalmology (Auckland, N.Z.)2022

DOI: 10.2147/opth.s339385 PMID: 35282167

Ophthalmology-focused publications and findings on COVID-19: A systematic review

Ya-Ping Jin, Graham E. Trope, Sherif R. El-Defrawy, Elin Y Liu, Yvonne M. Buys

European Journal of Ophthalmology202125 citationsOpen Access

DOI: 10.1177/1120672121992949 PMID: 33557602

The Effect of Government-Uninsured Optometric Services on the Use of Primary Care Providers

William Jeon, Graham E. Trope, Yvonne M. Buys, Richard Wedge, Sherif R. El-Defrawy, Qi-Sheng Chen, Ya-Ping Jin

Clinical Optometry20211 citationsOpen Access

DOI: 10.2147/opto.s303087 PMID: 33911907

Planning for an international symposium on patient/physician shared decision making for cataract surgery appropriateness and prioritization

Principal investigatorCIHR2022Planning and Dissemination Grant - Institute Community Support

Principal investigators: Schlenker, Matthew; El-Defrawy, Sherif R

Keywords: Access To Care; Appropriateness; Cataract; Model Of Care; Ophthalmology; Patient-Centred; Prioritization; Shared Decision Making; Surgery; Wait Times

$9,970

Setting the foundation for the development of a patient- and provider-informed cataract surgery care model

Principal investigatorCIHR2021Catalyst Grant: Quadruple Aim and Equity

Principal investigators: Schlenker, Matthew; El-Defrawy, Sherif R

Keywords: Access To Care; Appropriateness; Cataract; Model Of Care; Ophthalmology; Patient-Centred; Prioritization; Shared Decision Making; Surgery; Wait Times

$99,774

Comparative effectiveness of newer oral diabetes medications in preventing advanced diabetic retinopathy

Co-investigatorCIHR2019Project Grant

Principal investigators: Campbell, Robert J

Keywords: Blindness; Diabetic Retinopathy; New Diabetes Treatment; Population-Based; Vision Loss And Impairment

$130,000

Comparative safety of aflibercept and ranibizumab in the treatment of retinal diseases

Co-investigatorCIHR2016Project Grant

Principal investigators: Campbell, Robert J

Keywords: Aflibercept; Comparative Safety; Drug Safety; Health Services Research; Ophthalmology; Ranibizumab; Retinal Diseases

$110,000

An analysis of Prince Edward Island's vision health coverage policy

Co-investigatorCIHR2012Healthcare Renewal Policy Analysis

Principal investigators: Jin, Yaping; Wedge, Richard; Trope, Graham E

Keywords: Diabetes; Dry Eye; Family Physicians; Framework Of The Ontario Health Technology Advisory Committe; Health Insurance; Ophthalmologists; Optometrists; Red Eye; Routine Eye Examinations; Vision Health Policy

$149,962

Glaucoma: The Silent Thief Of Vision. Understanding Optic Neuropathies and Associated Vision Loss

Principal investigatorCIHR2011CIHR Café Scientifique Program

Principal investigators: Irrcher, Isabella; Campbell, Robert J; El-Defrawy, Sherif R; Jinapriya, Delan

Keywords: Blindess; Glaucoma; Optic Neuropathy; Retinal Ganglion Cell Death

$3,000

Optocase: Impact of Diabetic Retinopathy on Quality of Life and New Guidelines for Optometrists to Classify and Refer

Principal investigatorCIHR2011Knowledge Translation Supplement

Principal investigators: Sharma, Sanjay; El-Defrawy, Sherif R

Keywords: Collaborative Guidelines; Diabetic Retinopathy; Optocase

$70,325

Cardiovascular and Ocular Adverse Events Associated with New Treatments for Age-Related Macular Degeneration

Co-investigatorCIHR2010Operating Grant

Principal investigators: Campbell, Robert J

Keywords: Administarative Database Research; Adverse Drug Events; Age-Related Macular Degeneration; Drug Safety; Ophthalmology; Vascular Endothelial Growth Factor Inhibitors

$176,906

The Risk of Flomax on Cataract Surgery - Online Video KT

Co-investigatorCIHR2009Knowledge Translation Supplement

Principal investigators: Sharma, Sanjay

Keywords: Cataract Surgery; Flomax; Internet; Knowledge Translation; Video

$39,800

From public funding decisions: CIHR since 2008, NSERC since 1991 and SSHRC since 1998 with their latest competition results, the Canada Foundation for Innovation, Genome Canada, the Canadian Space Agency, Canada Research Chairs, the Fonds de recherche du Québec, Ontario research funding, Michael Smith Health Research BC, the Canadian Cancer Society, Heart & Stroke and Brain Canada.

Profile data last refreshed on September 29, 2026 from the university directory, publication records and public research funding records.

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Sherif El-Defrawy

Research

Latest papers

Latest funding

Contrasting approaches to estimate the epidemiology of uveitis in Canadian health administrative data.

Assessing the impact of ophthalmology locum clinic rotation in Northeastern Ontario.

Documenting the subjective patient experience of first vs second eye during immediately sequential bilateral cataract surgery.

Association of rural or urban status, region, and institution type with cataract surgery wait times in Ontario, Canada

Prevalence of glaucoma in Canada: results from the 2016–2019 Canadian Health Measures Survey

Multi-center validation of Catquest-9SF visual function questionnaire in Ontario, Canada

Preoperative evaluations for ophthalmic surgery: A systematic review of 48,869 eyes

Patient Satisfaction and Visual Function Following Implantation of Trifocal or Extended Range of Vision Intraocular Lenses.

Ophthalmology-focused publications and findings on COVID-19: A systematic review

The Effect of Government-Uninsured Optometric Services on the Use of Primary Care Providers

Frequent collaborators

Yaping Jin

Wendy Hatch

Graham Trope

Christoph Kranemann

Peng Yan

Neera Singal

Raymond Stein

Robert Reid

Rosa Braga-Mele

Laura Rosella

Michael Brent

Varun Chaudhary

Simona Minotti

John Gorfinkel

John Flanagan

John Lloyd

Matthew Schlenker

Marko Popovic

Amandeep Rai

Ziad Butty

Yvonne Buys

John Flanagan

Kednapa Thavorn

Jessica Widdifield

Peter Kertes

Wendy Lou

Edward Margolin

Christopher Hudson