Our Physicians
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Dr. Oli | M.D.

Dr. Oli, whose name is really Oli Traustason, has chosen to go by Dr. Oli to make it easier on his patients to remember his name.

Not long after entering the private practice of eye care, Dr. Oli decided that in order to serve patients best he wanted to become skillful at taking care of cataracts. When an opportunity came up to join a clinic that was dedicated to the treatment of cataracts, Dr. Oli moved from Southern California to the Northwest. He performed thousands of cataract removals over the next several years, honing his skills.

Dr. Oli has focused on the treatment of cataracts since 1989 and has done over 40,000 procedures to cure cataracts. During those years he has had experience with all types of cataracts, including the most difficult to treat. He has used all the different types of implants available in the United States. Safety in cataract surgery has been an over-riding factor in opening up a walk-in surgery center in Central Oregon.

Providing a comfortable treatment environment to help people relax is an important consideration. Also, working with optometrists to take care of patients has allowed us to concentrate on what we can do best, leaving to the optometrist what they do best, which is why we do not give glasses prescriptions or sell glasses and contact lenses.

Dr. Oli believes as a professional that his primary obligation is to the patients and their choices. He believes in providing quality examinations and using technology to help in caring for patients. He also feels it his duty to guide patients in their choices of treatment, including artificial lenses, and not to pressure patients in their choices.


Dr. Kristine | M.D.

Dr. Kristine Traustason specializes in the treatment of vitreoretinal disease.  Dr. Kristine joined Eye Surgery Institute in 2007, after completing a retina fellowship at the University of California, San Diego.  Dr. Kristine graduated from Dartmouth College in 1995.  She graduated AOA from Loma Linda University Medical School in 2001.  She went on to do her internship and ophthalmology residency at University of California, San Diego, which she completed in 2005.   Dr. Kristine has been a board certified ophthalmologist since 2005.  Dr. Kristine is fluent in Spanish, enjoys running, mountain biking and golfing.



Dr. John Berreen | M.D.

Dr. Berreen was raised in Central Vermont, attending Union College in upstate New York where he graduated with honors in Physics.  He then completed his M.D. at the University of Vermont, becoming a member of the Medical Honor Society, Alpha Omega Alpha. After a medical internship and ophthalmology residency in Seattle, he worked for the Indian Health Service on the Navajo Reservation in Arizona, as well as in private practice in Alaska and at the Dartmouth Hitchcock Medical Center before completing a two year medical and surgical retina fellowship at Yale Medical Center.

In 2000, Dr. Berreen started the first full-time retina practice in Central Oregon, as well as a surgical retina program at St. Charles Medical Center.  He now focuses on the medical treatment of retinal disease, with an emphasis on macular degeneration, diabetic retinopathy and other retinal vascular diseases.  His guiding philosophies include an individualized and integrative approach to each patient, treating eye disease in the context of the whole person’s medical history and needs, and communicating closely with each patient’s other health care providers.


Contact Dr. Oli

Contact Dr. Kristine

Contact Dr. Berreen