Dr. John Berdahl specializes in advanced Cataract, Corneal and Glaucoma Surgery, in addition to Refractive Surgery. He graduated from Mayo Medical School in Rochester, MN and finished his internship at the Mayo Clinic in Scottsdale, AZ. He completed ophthalmology residency at Duke University and an anterior segment fellowship at Minnesota Eye Consultants. He has won numerous national awards including the Claes Dohlman Award from Harvard University and the Resident Writers Award and in 2013 was named the top young physician in South Dakota. Dr. Berdahl has published numerous book chapters and peer-reviewed articles and his research interests include Cerebrospinal Fluid Pressure in Glaucoma, Minimally Invasive Glaucoma Surgery, Refractive Laser Assisted Cataract Surgery (ReLACS) and Intraocular Lens Design. His commitment to those in need is demonstrated by his leadership role in EyeCare America (which provides free eye care to underserved) and the numerous surgical mission trips he continues to participate in worldwide.