About VisionGift

Meet Our Staff


Chris Stoeger, MBA, CEBT, CTBS

Chief Executive Officer

Mr. Stoeger has over 20 years of eye and tissue banking experience and is the co-author of many important scientific journal articles relating to eye banking and cornea transplantation. He has served in many important capacities on EBAA committees, including the Board of Directors and Accreditation.


Corrina Patzer

Chief Strategy Officer

Ms. Patzer has over 16 years of eye banking and ocular research experience. She has served on many committees within the EBAA in the past, and currently chairs the Legislative and Regulatory Affairs committee. Additionally, by appointment from the Oregon State Governor, Kate Brown, Corrina also serves on the Oregon Mortuary and Cemetery Board.


Kristin Mathes, MA, MS

Chief Regulatory Officer

Ms. Mathes has 16 years of eye banking and medical device experience. She has served on the EBAA QA committee in the past, including a role as chair from 2012-2014. She has a Bachelor’s and Master’s degree in Political Science from the University of Colorado – Denver as well as a Master’s of Science in Regulatory Science from Johns Hopkins University.


Linda Hanson

Chief Financial Officer

Linda has over 20 years of experience in finance and accounting. Prior to bringing her skills to the non-profit world, she was the CFO of a multi-store retail establishment with over 60 million in revenue. She holds a BS in Finance and International Business from Oregon State University.


Josh Galloway, CEBT

Vice President of Laboratory Services

Mr. Galloway has been with Lions VisionGift since 2003. He has been directly responsible for processing over 3500 corneas for endothelial surgery. Josh has trained surgeons and eye bank technicians from all over the world in processing tissue for DMEK and DSAEK surgeries. He is currently Vice-Chair of the EBAA Technician Education Committee, a faculty member of the EBAA Technician Education Seminar, and has been a primary and co-author on numerous presentations and articles.


Jameson Clover, CEBT

Vice President of Surgical Services

Ms. Clover has over 14 years of eye banking experience and has been involved in tissue distribution since 2006. During that time she has evaluated thousands of corneas to determine surgical suitability. She has served on the EBAA Statistics Committee since 2012, and is the current Chair of the Exam Committee.


Stephen Wehrer, MBA, CEBT

Vice President of Donor Services

Mr. Wehrer has 10 years’ experience in eye banking and ocular clinical settings giving him a well-rounded perspective on the donation/transplantation profession.


Khoa D. Tran, PhD

Vice President of Research & Development

Khoa joined Lions VisionGift in 2015 after completing his NIH-funded post-Doctoral fellowship at Oregon Health & Sciences University. Since then Khoa has co-authored 19 peer-reviewed publications related to corneal science and eye banking. He has been awarded 2 patents, over $90k of research funding, and the 2017 Troutman Cornea Prize for innovation in corneal science. He is a member of the EBAA Research Committee and a reviewer for journals related to eye banking and corneal transplantation.


Marie Engstrom

Vice President of Quality Systems

Ms. Engstrom has 15 years of eye banking experience and is a subject matter expert in quality assurance and FDA/EBAA regulatory compliance.  She has served on the EBAA QA Committee and presented on best practices for Eye Bank Internal Auditing Programs.  She holds a BS in Community Health Education and Psychology from Portland State University and is certified by the American Society of Quality as a Quality Improvement Associate.


Additional Staff

Medical Directors


Mark Terry, M.D.

Medical Director

Dr. Terry received his BA from Yale University and attended St. Louis University School of Medicine for medical school. He completed a residency in ophthalmology at the Naval Regional Medical Center in Oakland, California. Dr. Terry was a Cornea Fellow at the Dean McGee Eye Institute in Oklahoma City, Oklahoma. In addition to his clinical practice at the Devers Eye Institute and his duties as Eye Bank Medical Director, he is busy as the Scientific Director of the Lions VisionGift Vision Research Laboratory where he is working to advance endothelial keratoplasty. He is also a member of the Eye Bank Association of America Medical Advisory Board and member of the Paton Society. In 2016, the EBAA, honored him with the prestigious Paton Award for his contributions to corneal surgery and eye banking.


Terry Burris, M.D.

Co-Medical Director

Dr. Burris received his BS from Pittsburg State University and attended University of Kansas Medical School. He continued his medical education with a residency at the Naval Regional Medical Center in Oakland, California. Dr. Burris was a Cornea Fellow at the McGee Eye Institute in Oklahoma City, Oklahoma. Dr. Burris is the Founder and Medical Director of Northwest Cornea Services based in Tigard, Oregon. He has been an Eye Bank Medical Director since 1986 and is also a member of the Eye Bank Association of America Accreditation Board.


John Wilkins, M.D.

Co-Medical Director

Dr. Wilkins received his BS from Stanford University and attended Oregon Health and Science University School of Medicine. He completed a residency in Ophthalmology at Oregon Health and Sciences University where he developed his interest in eye banking as a technician before completing a cornea fellowship at the University of California San Francisco. He is the president of his practice, The Eye Clinic, P.C. He is also a member of the Oregon Commission for the Blind and the Eye Bank Association of America Accreditation Board.


Winston Chamberlain, M.D., Ph.D.

Co-Medical Director

Dr. Chamberlain received his BS in biology from California Institute of Technology. He holds a PhD in immunology and an MD from the University of Colorado Health Sciences Center. Dr. Chamberlain completed a fellowship in cornea and external diseases from the University of California, Irvine. He is a member of the American Academy of Ophthalmology and an assistant professor in the Department of Opthalmology at Oregon Health and Sciences University. His research interests include the outcomes of corneal transplant surgery with the femtosecond laser and DSAEK techniques, and inflammatory responses in the cornea. Dr. Chamberlain is an assistant professor in the Department of Ophthalmology at Oregon Health and Sciences University.


Naveen Rao, M.D.

Co-Medical Director

Dr. Rao received his undergraduate degree from Duke University in Chemistry and his Medical Degree from Baylor College of Medicine in Houston, Texas. He completed his residency at Casey Eye Institute, Oregon Health & Science University in Portland, Oregon. Dr. Rao then completed a fellowship in Cornea, External Disease, and Anterior Segment Surgery at New England Eye Center/Tufts Medical Center and Ophthalmic Consultants of Boston, in Boston, Massachusetts. He currently serves on staff at Lahey Hospital and Medical Center where he is Senior Staff Ophthalmologist – Cornea, Cataract, Anterior Segment, and Refractive Surgery. Dr. Rao is a frequent lecturer with extensive research and publication experience.


Hajirah N. Saeed, M.D.

Co-Medical Director

Dr. Saeed graduated from Benedictine University summa cum laude, and then received her MD from Loyola University, Stritch School of Medicine, with honors. Following this, she completed her Ophthalmology Residency at Loyola University Medical Center, and her Clinical Fellowship in Cornea and Refractive Surgery at Mass. Eye and Ear. She served as chief fellow in her second year and has received many awards in recognition of her patient care and research, including an American Society of Cataract and Refractive Surgery Foundation Resident Excellence Award, the Chicago Ophthalmological Society’s Beem Fisher Award, and two Illinois Society for the Prevention of Blindness Awards.


Michael Straiko, M.D.

Co-Medical Director

Dr. Michael Straiko, M.D. Associate Medical Director Dr. Straiko received his BS from Allegheny College and attended University of Cincinnati College of Medicine. He completed his residency in Ophthalmology at the Washington University in Saint Louis, Missouri. Dr. Straiko then completed a fellowship in Cornea, External Disease, and Refractive Surgery at the Devers Eye Institute in Portland, Oregon. Dr. Straiko is the author of research on cornea tissue processing and corneal transplantation.


Medical Advisory Committee


Kevin Winthrop, M.D., MPH

Dr. Winthrop received his M.P.H. from the University of California, Berkeley; and his M.D. from Oregon Health & Science University in Portland, Oregon.  Dr. Winthrop specializes in international ophthalmology, public health and infectious disease epidemiology with an emphasis in mycobacterial diseases and opportunistic infections associated with rheumatic disease and immunosuppressive therapies.


Shandiz Tehrani, M.D., Ph.D

Dr. Tehrani attended undergraduate school at Occidental College where he studied chemistry prior to receiving his MD and PhD from Washington University School of Medicine in St. Louis. He then continued his training with a residency in ophthalmology from Oregon Health & Science University in Portland, Oregon.  Following residency, Dr. Tehrani completed a year of subspecialty fellowship training in glaucoma at the University of Iowa in Iowa City. He currently practices in the subspecialty of glaucoma at the Casey Eye Institute where he divides his time between teaching, patient care, and research. 


Albert Jun, M.D., Ph.D.

Dr. Jun is the Maurice E. Langham, Ph.D. Professor of Ophthalmology and chief of the Division of Cornea, Cataract and External Eye Diseases at the Wilmer Eye Institute at Johns Hopkins. He received his BA from Harvard University in biochemistry. He then received his medical degree and his Ph.D. in genetics and molecular biology from Emory University. He completed his residency at the Wilmer Eye Institute. Thereafter, he completed a Cornea and External Disease Fellowship and a Corneal Gene Therapy Research Fellowship in London at Moorefields Eye Hospital. Dr. Jun’s clinical and research interests include endothelial keratoplasty, refractive surgery, genetic analysis of corneal diseases and corneal gene therapy.


Afshan Nanji , M.D.

Dr. Nanji obtained her undergraduate degree at Princeton University where she studied molecular biology prior to receiving her MD from Johns Hopkins University School of Medicine. She then obtained her MPH from the Johns Hopkins Bloomberg School of Public Health and completed ophthalmology residency at the Wilmer Eye Institute of Johns Hopkins Hospital. Following this, she did fellowships in cornea and refractive surgery as well as ocular surface oncology at the Bascom Palmer Eye Institute in Miami, FL. She is now a full-time member of the Cornea and Refractive Surgery Service at Oregon Health and Science University where she spends her time between patient care, research, and resident and fellow education.


Divya Srikumaran , M.D.

Divya Srikumaran, M.D, is an assistant professor of ophthalmology in the Division of Cornea and External Disease at the Johns Hopkins Wilmer Eye Institute. She received her M.D. degree from Northwestern University Feinberg School of Medicine, after which she completed her ophthalmology residency and cornea fellowship training at the Wilmer Eye Institute. She is the medical director for the Odenton Satellite location and specializes in the management of corneal disorders, including Fuchs dystrophy and keratoconus.  Dr. Srikumaran’s research interest includes the assessment of corneal transplant outcomes and risk factors for receiving keratoplasty through big data sources including administrative claims data. She recently received the Hoskins Center IRIS Registry Research Fund Award through the American Academy of Ophthalmology to assess disparities in endothelial keratoplasty outcomes in the United States.  She is also a renowned educator and currently serves as Vice Chair of Education and was previously residency program director. She has been instrumental in developing the educational curriculum for residents, with a particular focus on surgical teaching.  Blending her passion for both education and expertise in corneal surgery, Dr. Srikumaran also studies barriers to adoption of advanced keratoplasty procedures in the US and abroad. 


Peter Veldman, M.D.

Dr. Veldman received his BA from the University of Pennsylvania and his medical training at the University Of Pennsylvania School of Medicine. He then completed a residency in ophthalmology at the Harvard Medical School Department of Ophthalmology, after which he completed an additional year at Harvard as the Ophthalmology Chief Resident and Director of Trauma Services. Dr. Veldman was then a Cornea Fellow at the Devers Eye Institute in Portland, Oregon. After completing fellowship, Dr Veldman returned to Boston where as a full-time member of the Cornea and Refractive Surgery Service at Massachusetts Eye and Ear, with specialized focus in lamellar corneal transplantation. In 2017, Dr. Veldman joined the faculty of the University of Chicago Department of Ophthalmology. Dr Veldman collaborates closely with Lions VisionGift, particularly with respect to the laboratory validation and clinical implementation of the S-Stamp for DMEK.


Ula V. Jurkunas, M.D.

Dr. Ula Jurkunas is a clinician-scientist and surgeon at the Cornea and Refractive Surgery Service of the Mass. Eye and Ear and a Co-director of the Harvard Medical School (HMS) Ophthalmology Cornea Center of Excellence. She conducts basic science and clinical research on Fuchs endothelial corneal dystrophy and stem cell transplantation of the ocular surface. In addition, she teaches residents and fellows about corneal surgical procedures as well as diagnosis and clinical management of corneal and refractive conditions. Her main clinical areas of expertise are corneal endothelial dysfunction, femtosecond cataract surgery, refractive surgery, and lamellar keratoplasty, including DMEK and complex DSAEK. 

After obtaining her medical degree from University of Louisville, Dr. Jurkunas completed her ophthalmology residency at Boston University. She then performed subspecialty training in cornea, external diseases, and refractive surgery at Mass. Eye and Ear, serving as Chief Cornea Fellow for a year. Dr. Jurkunas was one of the first in the HMS Ophthalmology Department to receive the prestigious K12 Harvard Vision Clinical Scientist Development Program, an award funded by the NIH/NEI. As a K12 scholar, she conducted award-winning research into the pathophysiology of Fuchs endothelial corneal dystrophy, where she has pioneered the efforts in linking oxidative stress with pathogenesis of Fuchs dystrophy. Today, she heads a fully-staffed and RO1-NIH funded laboratory, which studies the mechanisms involved in the corneal endothelial degeneration seen in Fuchs dystrophy. Her studies focus on the role of oxidative stress in cell-extracellular matrix interactions, estrogen metabolism, DNA damage and repair, and mitochondrial biogenesis in Fuchs dystrophy.