351 E. Rolling Oaks Drive
Suite 102
Thousand Oaks, CA 91361

Tel: 805.497.3744
Fax: 805.497.1663

2045 Royal Avenue
Suite 125
Simi Valley, CA 93065

Tel: 805.527.6720
Fax: 805.527.1889

5643 Kanan Road
Agoura Hills, CA 91301

Tel: 818.889.2020
Fax: 818.706.0288


Physician Staff

Joel M. Corwin, M.D.
Medical Director
Retina-Vitreous Specialist
Diabetic Retinopathy
Diabetic Evaluation and Care
Research Studies

Daniel A. Ebroon, M.D.
Plastic & Reconstructive Surgery
Cosmetic Eyelid Surgery
Forehead & Brow Lifts

John L. Davidson, M.D.
LASIK Surgery
Refractive Surgery
Glaucoma Surgery
Cataract Surgery
Pediatric Ophthalmology
Adult Strabismus Surgery

Shayna Mangers, M.D.
Glaucoma Specialist

Andrew Young, M.D.
Glaucoma Specialist

Ashish Toor, M.D.
Comprehensive Ophthalmology

John P. Fang, M.D.
Cataract Lens Implants
Cataract Surgery
Refractive Surgery/LASIK/PRK
Corneal Transplant Surgery
Treatment of Corneal Infections
Pterygium & Graft Surgery
Dry Eye Specialist / Punctal Plugs
Comprehensive Adult & Adolescent Eye Care

Adam Martidis, M.D.
Director of Research Studies
Retina-Vitreous Specialist
Diabetic Retinopathy
Macular Degeneration
Complex Retinal Vitreous Surgery

Benica Eyvazzadeh, O.D.
Comprehensive Optometry
Contact Lenses

David I. Halpert, O.D.
Comprehensive Optometry
Contact Lenses
Children's Vision Care

Jaspinder Kalra, O.D.
Comprehensive Optometry
Contact Lenses

Patient Experience Survey

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Our physicians



Joel M. Corwin, M.D.- Medical Director

Joel M. Corwin, M.D. received his M.D. and ScB. degrees from Brown University. He completed an internship at Cedars-Sinai Medical Center, a residency in ophthalmology at Tufts-New England Medical Center, and a fellowship in retina-vitreous at Retina Associates, where he led a diabetic retinopathy vitrectomy study. He has participated in numerous research projects in uveitis, ocular immunology, glaucoma and other areas.

Dr. Corwin is board-certified by American Board of Ophthalmology and is a diplomate of the National Board of Medical Examiners. He is a member of the American Association of Ophthalmology, the American Uveitis Society, and the West Coast Retina-Vitreous Study Club. He has received numerous honors and awards throughout his career and was President of the American Diabetic Association from 1987-1988.




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William Stivelman, M.D.

William Cooper Stivelman, M.D. earned his medical degree in 1982 from Rosalynd Franklin School of Medicine, North Chicago, IL. He then completed a residency in Internal Medicine at Santa Barbara Cottage Hospital in Santa Barbara, California and a residency in ophthalmology at Northwestern University Medical Center (McGaw Medical Center, Lakeside Veterans' Administration Hospital, Children's Memorial Hospital, Evanston Hospital) in Chicago. He was also awarded a fellowship in Medical Ophthalmology, Glaucoma and Medical Retina at Mt. Zion Hospital and Medical Center in San Francisco.

Dr. Stivelman is a Diplomate of the National Board of Medical Examiners and the American Board of Ophthalmology, and is a Fellow of the American Academy of Ophthalmology. His professional memberships include:

Dr. Stivelman is an Independent Medical Evaluator as well as an Expert Reviewer in Ophthalmology for the Medical Board of California. He is an Associate Clinical Professor of Ophthalmology at Stein Eye Institute/Center for Health Sciences, UCLA. He has published articles in respected journals, co-produced an electronic cross-referenced ophthalmic lexicon currently in use at Northwestern University's Fluorescein Angiography Library and elsewhere, and co-authored and contributed to several books on classical music. He speaks fluent French and Medical Spanish.

Honors and Awards include:

Dr. Stivelman is affiliated with the following hospitals:

Dr. Stivelman's Farewell Letter

Dear Patients:

After three decades practicing ophthalmology, I will retire in mid-December, 2014. The decision is based principally in my desire to spend the future committing more time to a charitable pursuit in which I am already deeply involved, and enjoying music and photography through world travel.

Patients currently seeing me for glaucoma or the suspicion of glaucoma should continue their care with Shayna Mangers, M.D., a Barnes Hospital, St. Louis-trained glaucoma specialist who joined us over six years ago. Alternatively, if preferred, patients may elect to see Andrew Young, MD., trained within the Glaucoma Division of UCSD, who joined us eight years ago. Patients continuing their general eye care (e.g. annual examinations, anterior segment urgencies) should see Ashish Toor, MD, who was educated both at Cambridge University, UK and later in residency at Mount Sinai, NYC. She began her fifth year in our group this past summer. Those interested in contact lenses in conjunction with annual well eye care examinations may see Benica Eyvazzadeh, O.D. or Jaspinder Kalra, O.D. All Conejo-Simi Eye providers are eminently qualified to provide ongoing medical services to my established patients as well as new patients, and each is affable, available, and committed to providing a high level of clinical care available, in my opinion. Each has considerable clinical experience with commensurate interpersonal skills and acumen. All will gladly consult your new patient referrals henceforth, as I am now no longer seeing new patients to the practice.

Our practice has grown from a two doctor, two office general ophthalmology practice in 1987 to, in 2014, a nine affiliated office, two surgicenter, twenty-five care provider associated multisubspecialty ophthalmology network. Patients may obtain care from nearly all ophthalmologic disciplines including comprehensive ophthalmology, retina-vitreous, glaucoma, ophthalmic plastics/reconstruction, pediatric ophthalmology, cataract surgery, keratorefractive surgery and contact lenses, with academic associations.

Many thanks for your trust over the past decades. I am confident that Conejo-Simi Eye Medical Group and its network of physicians will ably serve the population of Ventura County long into the future.

Very respectfully yours,

William C. Stivelman, M.D.
Associate Clinical Professor of Ophthalmology,
   Stein Eye Institute/Center for Health Sciences, UCLA
Agreed Medical Evaluator
Independent Medical Evaluator
Independent Medical Reviewer, State of California
Expert Reviewer in Ophthalmology, Medical Board of California
Co-Director of Lions-Doheny Eye and Tissue Transplant Bank of
   Central Coast, an EBAA Affiliate, University of Southern California, 1992-2005
QME, State of California, 1988-2011
Clinical Instructor in Ophthalmology, UCSF 1986-1987


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Daniel A. Ebroon, M.D.

Daniel A. Ebroon, M.D. earned his medical doctorate from Northwestern University Medical School in Chicago, Illinois after graduating in the top 2% of his class at Massachusetts Institute of Technology with a B.S. in molecular biology. Dr. Ebroon completed an internship in transitional medicine and a residency in ophthalmology at Northwestern University Medical School as well as a fellowship in ophthalmic plastic surgery at Manhattan Eye, Ear and Throat Hospital in New York, NY.

Dr. Ebroon is board-certified by the American Board of Ophthalmology. He is affiliated with several professional societies, including the American Society of Ophthalmic Plastic and Reconstructive Surgery and the American Academy of Ophthalmology. He is also a member of Alpha Omega Alpha and Sigma Xi Honor Society.

Dr. Ebroon has published several articles and textbook chapters. He has taught hundreds of hours of lectures to medical students and residents in Los Angeles, Chicago and New York. He was on the Board of Directors at Northwestern Healthcare Alliance for three years and held several faculty positions at Northwestern University including Clinical Practice Director, Director of the Ophthalmology Residency Program, and Assistant Professor of Ophthalmology. He is currently on the faculty at the Jules Stein Eye Institute at the David Geffen School of Medicine, UCLA.

Dr. Ebroon has attending staff privileges at the following hospitals:


Visit Dr. Ebroon's personal website: www.ebroon.com

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