Lynn Eye Medical Group, Inc. | 2230 Lynn Rd | Suite #102 | Thousand Oaks, CA 91360 | Tel: (805) 495-0458

Our Doctors

Roy T. Butera, M.D.

Ophthalmologist Dr. Roy T. Butera  M.D. | Thousand OaksDr. Roy Butera is a board-certified ophthalmologist specializing in comprehensive care, with a special interest in cataract surgery and intraocular lens implants. Dr. Butera practices in Thousand Oaks and provides a full spectrum of ophthalmic services for adults and children over ten years of age, including routine evaluations, glasses, contact lenses, eye diseases and surgery.

Dr. Butera graduated summa cum laude from the University of Illinois in biologic sciences. He received his medical degree from Northwestern University, where he was elected to the Alpha Omega Alpha Medical Scholastic Honorary. Dr. Butera then completed his internship at Mercy Hospital and Medical Center, and residency training at the University of Wisconsin Center for Health Sciences, where he served as chief resident.

In addition to his training, Dr. Butera also participated in a clinical research project in fluorescein angiography at Northwestern University, co-authored several medical publications, and completed a clinical preceptorship at Guy's Hospital in London, England. He is a Fellow of the American Academy of Ophthalmology.

Back to Top

Charles A. Cooper, M.D.

Ophthalmologist Dr. Charles A. Cooper  M.D. | Thousand OaksDr. Charles Cooper is a board-certified ophthalmologist specializing in infant and pediatric eye care. He also provides comprehensive eye care for adult patients. Dr. Cooper has practiced at Lynn Eye Medical Group since 1985, and also holds an academic appointment as an Assistant Clinical Professor of Ophthalmology at Jules Stein Eye Institute at UCLA. He has extensive experience in the management of medical and surgical diseases of the eyes in children. He has performed over 4,000 surgical procedures, including strabismus surgery (eye muscle surgery) in children and adults, nasolacrimal duct surgery (tear duct surgery) and surgery to correct disorders of the eyelids in children. Conditions routinely treated in the office setting include refractive errors in children, amblyopia, the diagnosis of causes of visual loss identified in abnormal vision screening exams at school or by the child's primary care doctor, and ocular injuries.

Dr. Cooper is a proud Aggie, having received his undergraduate degree in Genetics from the University of California, Davis. He earned his medical degree from the University of California, Irvine School of Medicine. He then completed his internship in Internal Medicine at St. Mary’s Hospital and Medical Center in San Francisco and his residency training in ophthalmology from the University of California, Irvine. Dr. Cooper also completed a fellowship in pediatric ophthalmology and strabismus at the Jules Stein Eye Institute at UCLA.

Dr. Cooper is a Fellow of the American Academy of Ophthalmology and a member of the American Association for Pediatric Ophthalmology and Strabismus. Dr. Cooper is also the past President and a previous charter member of the Ventura County Ophthalmology Society, and has served as an expert reviewer for the Medical Board of the State of California.

Back to Top

Joel M. Corwin, M.D.

Ophthalmologist Joel M. Corwin, M.D. | Thousand OakJoel 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 the 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.

Back to Top

John L. Davidson, M.D.

Ophthalmologist John L. Davidson, M.D. | Thousand OakJohn L. Davidson, M.D. specializes in Laser Vision Correction/LASIK, Refractive Cataract/Lens Surgery, and Adult Strabismus Surgery. He is Board-Certified by the National Board of Medical Examiners and the American Board of Ophthalmology. Dr. Davidson has performed more than 25,000 refractive and cataract surgeries and has been named one of Southern California's Super Doctors in 2013 and 2014 as well as "America's Top Ophthalmologists" by the Guide to America's Top Ophthalmologists every year since 2007.

Dr. Davidson earned his Medical Doctorate with Highest Distinction (top 1%) from Indiana University in Indianapolis, Indiana, after earning Bachelor of Arts degrees in Biology and Chemistry from Indiana University in Bloomington, also with Highest Distinction (top 1%). He completed a Residency in Ophthalmology at Indiana University in Indianapolis and was a Fellow in Pediatric Ophthalmology and Strabismus at the Jules Stein Institute in Los Angeles, where he won the Fellowship Research Award.

Dr. Davidson has earned recognition from the American Medical Association and the California Medical Association for the hundreds of hours of continuing medical education (CME) he has completed. He is an Assistant Clinical Professor of Ophthalmology at the Jules Stein Institute, UCLA School of Medicine. He has also published articles in the Journal of Pediatric Ophthalmology & Strabismus.

For a detailed explanation on your Cataract Surgery Journey- download Dr. John Davidson's Guide to Cataract Surgery from start to finish.

Back to Top

Daniel A. Ebroon, M.D.

Ophthalmologist Daniel A. Ebroon, M.D. | Thousand OakDaniel 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.

Back to Top

Devin C. Hymas, M.D.

Ophthalmologist Dr. Devin C. Hymas M.D. | Thousand OakDr. Devin Hymas is a board-certified ophthalmologist practicing at Lynn Eye Medical Group since 2001. At Lynn Eye, Dr. Hymas provides comprehensive ophthalmology services for adults and children over the age of eight. He specializes in cataract surgery with intraocular lens implants, as well as the detection and management of glaucoma, dry eye, macular degeneration and diabetic eye disease. He also performs exams for eyeglass and contact lens prescriptions

Dr. Hymas received his medical degree from the University of Utah School of Medicine, where he received honors in several areas of practice. He did a fellowship in ophthalmic pathology/research at the John A. Moran Eye Center in the University of Utah School of Medicine. He then completed his residency training in ophthalmology at the State University of New York at Buffalo.

Dr. Hymas has co-authored several articles for publication and academic presentations, as well as been involved with clinical research. He is a Fellow of the American Academy of Ophthalmology.

Back to Top

Adam Martidis, M.D.

Ophthalmologist Adam Martidis, M.D. | Thousand OakAdam Martidis, M.D. earned his medical degree at the University of Pittsburgh. Following graduation, he completed a residency at Indiana University where he served as chief resident in his final year. During his residency, he earned the Grayson Leadership Award, an honor given to only three prior graduating residents in the history of the training program. He was also awarded a vitreoretinal fellowship at the New England Eye Center in Boston. Upon completion of this two-year fellowship, he accepted an academic position at Wills Eye Hospital in Philadelphia, an internationally recognized eye institution. Here, Dr. Martidis trained numerous residents and retina fellows in surgical and medical retinal diseases in one of the largest and most highly regarded programs in the nation. He has participated in multiple research studies, including personal projects and national clinical trials.

Back to Top

M. Gene Matzkin, M.D.

Ophthalmologist Dr. M. Gene Matzkin M.D. | Thousand OaksDr. Matzkin graduated from the UCLA School of Medicine and received his ophthalmology training at UCLA's Jules Stein Eye Institute and Harbor General Hospital. He then entered the U.S. Navy and as a Lieutenant Commander, was the sole ophthalmologist on Guam for two years. Since 1974, he has been in private practice with the Lynn Eye Medical Group, primarily interested in general ophthalmology with a focus in cataract surgery. He has been active in teaching eye surgery, and since 1990 has been Associate Clinical Professor of Ophthalmology at the Jules Stein Eye Institute, receiving the UCLA Department of Ophthalmology Senior Honor Award in 2000.

Back to Top

Jaspinder Kalra, O.D.

Dr. Jaspinder Kalra graduated from Nova Southeastern College of Optometry in 2010. Dr. Kalra has experience providing post-operative care to cataract, laser vision correction, and minor surgery patients. She performs comprehensive eye exams, contact lens fittings, and refractive surgery consultations. She also has certification in the treatment and management of ocular disease with therapeutic pharmaceutical agents (TPA).

Dr. Kalra is fluent in Punjabi and speaks moderate Spanish.

Professional memberships include:

  • American Optometric Association (AOA)
  • California Optometric Association (COA)
  • TriCounty Optometric Association

Back to Top

Lynn Eye Medical Group, Inc. | 2230 Lynn Rd | Suite #102 | Thousand Oaks, CA 91360 | Tel: (805) 495-0458