Dr. Berdahl is a board certified ophthalmologist who is internationally regarded as a leader in LASIK, cataract, cornea, and glaucoma surgery. He is among a very small group of U.S. surgeons fellowship-trained in cornea, glaucoma, and refractive surgery. Read More
Dr. Berdahl is most motivated by the trust his patients place in him during their moments of vulnerability.
That patient trust has, first and foremost, driven him to become an accomplished surgeon. However, as he meets patient needs and learns more about the problems they face, he’s had several opportunities to stretch his skills as an inventor and problem-solver. He co-invented the MKO melt, an innovation used in our Sioux Falls clinic that provides sedation during cataract surgery without the use of an IV or opioids. He created astigmatismfix.com, a resource that has helped tens of thousands of surgeons eliminate residual astigmatism after cataract surgery, and he co-founded ExpertOpinion.MD, a site where patients can request medical opinions from authentic world experts. He also is the founder of Equinox, a company developing the first non-surgical, non-pharmacologic way to lower eye pressure for glaucoma treatment.
Dr. Berdahl is exceptionally skilled at diagnosing the best treatment for varying stages of glaucoma, corneal diseases, and cataracts. He is also a meticulous refractive surgeon. Should surgery be recommended, Dr. Berdahl will employ the most innovative and tested techniques available to effectively treat most diseases of the anterior segment (front part of the eye).
John is devoted to his wife, Tamme, and their children. The Berdahl family’s interests range from outdoor activities such as water sports, hunting, scuba diving, astronomy, and athletics to playing the guitar, cooking, and community involvement. John is an avid reader..
Supporting underserved people is a passion for John. He does this through EyeCare America, mission trips, and the Mission Vision program at Vance Thompson Vision, through which he performs dozens of free surgeries every year.
Dr. Berdahl has been involved in numerous FDA-monitored clinical trials on the most exciting technologies in ophthalmology. His published works have been highly cited and focus primarily on glaucoma, minimally invasive glaucoma surgery, and astigmatism management during and after cataract surgery.
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Dr. Berdahl always looks forward to welcoming new and current patients. To schedule a consultation with his team, simply call the number below or click Contact Us and we’ll be in touch shortly. We are honored by the opportunity to serve you.