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Doctors & Staff

Meet the experienced and friendly doctors and staff who make Vision Source – Wamego/Manhattan a proud provider of vision care products and services in Wamego and Manhattan.


Our Doctors


Kyler Knobbe, O.D.

Dr. Kyler Knobbe grew up on his family’s Western Kansas farm and ranch in Sharon Springs. He went on to attend Kansas State University where he received his Bachelor of Science degree majoring in Life Science in May 2011. In May 2015, he received his Doctorate of Optometry degree from Rosenberg School of Optometry in San Antonio, Texas. During his time in optometry school, Dr. Knobbe gained his Student Fellowship and became a member of the Beta Sigma Kappa Optometric Honor Society. He was highly involved in many academic clubs including private practice, contact lens, and sports vision training to further broaden his interests. Also, he was selected by his class and faculty to represent in various leadership roles as Vice President of his class and a Student Ambassador of his school. Dr. Knobbe completed his externships in San Antonio and Oklahoma City focusing on primary eye care, contact lenses including specialty lenses, pediatric exams, vision therapy, and co-management of refractive/cataract surgeries. He concluded his externships at the Viera VA in Florida where he received enhanced training in diagnosis and treatment of many ocular diseases such as diabetic retinopathy, macular degeneration, and glaucoma. Dr. Knobbe strives to utilize the newest technology available in eye care for his patients and has special interests in ocular disease management, fitting all types of contact lenses, and providing thorough exams for patients of all ages. He is a member of the American Optometric Association and the Kansas Optometric Association.

He and his wife Maggie, a 1st grade teacher at Central Elementary, enjoy spending time with family and friends, going to the lake, and attending sporting events at their alma mater, the K-State Wildcats! Dr. Knobbe primarily sees patients in our Wamego office and is currently accepting new patients.


Brandi Erichsen, O.D.

Dr. Brandi Erichsen grew up on a farm near Chapman, KS. She received her undergraduate degree from Kansas State University, graduating Cum Laude with a Bachelors of Science in Biology and minor in Leadership. She then attended the University of Missouri Saint Louis College of Optometry in Saint Louis Missouri, where she received her Doctorate of Optometry, in 2015. Dr. Erichsen completed externships in Saint Louis and the VA in Wichita Kansas, focusing particularly in ocular disease, primary care, contact lenses, vision therapy, and pediatrics. Dr. Erichsen is currently a member of the Kansas Optometric Association, American Optometric Association, and a board member for Kids in Crisis.

Brandi and her husband Brandon, a pipefitter, enjoy spending time with their dog Sadie, hunting or fishing, and cheering on the Wildcats!