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Baseline Vision Clinic


Doctors & Staff

Meet the experienced and friendly doctors and staff who make Baseline Vision Clinic the leading provider of vision care products and services in Hillsboro.


Joan Ploem Miller, OD

Dr. Joan Miller moved to Hillsboro, OR when she was a little girl and has dedicated her life to giving the locals the best eye care she can offer. She became interested in the field of Optometry around the age of 14. After receiving her bachelor’s degree, Dr. Miller went on to complete her Optometry Doctorate at Pacific University College of Optometry in 1979. After 20 years of practice, Joan was named Oregon Optometrist of the Year in 2002. Now, with forty years of experience and yet staying up-to-date with technology and the latest research, she takes care of your eyes like she would want her own eyes cared for.


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Sarah Olmschenk, OD

Dr. Sarah Olmschenk has been interested in eyes and optometry ever since grade school.  She received her first pair of glasses in fourth grade, and has been motivated to give the gift of clear vision to others ever since.  Dr. Olmschenk grew up on a farm in rural Minnesota and received her undergraduate degree from Minnesota State University Moorhead. She then traveled to Pacific University College of Optometry to obtain her doctorate degree in optometry, graduating with distinction in 2006. Dr. Olmschenk has completed a series of clinical internships in numerous facets of optometry, including family practice, vision therapy, and ocular disease.  She particularly enjoys examining infants and young children; early eye exams are key to preventing serious problems later and provide visual comfort and efficiency during the learning years.  Dr. Olmschenk has a young daughter and son of her own, and loves every minute spent watching them grow up.


Dispensing Opticiansarah

Sarah Hering-Washington, B.S., ABOC: is the newest member to the Baseline Vision Clinic team.  Sarah graces us with a vast knowledge of the optical background which has quickly become an asset to our office. She has worked at both private practice and retail chains. Please know your glasses options, decisions and repairs are very safe in Sarah’s hands. Outside of the office Sarah enjoys keeping up with her children!



Optometric Technicians

Staff Photos2Olga Merecias, CPO: With years of experience as a certified technician, Olga is well versed in all our specialty eye equipment at the office. She also serves as our wonderful Spanish translator when needed. In her free time, Olga enjoys being mom to her one year old little boy, Christian and spending time with family.

Sam Huffman has 4+ years of experience in the eye care field, Sam serves as a technician at the office. Sam also helps with insurance and billing . In his free time, Sam enjoys fishing, sports and riding his motorcycle.

Our technicians are responsible for completing all the pre-testing including visual acuity, visual field testing, endothelial corneal cell scans, taking retinal photos and scans, etc. They are all truly passionate and eager to help the optometrists in giving the best patient care possible.


Billing and Administration

Linda Coe  is our office manager. With her years of involvement, she has made it her obligation to understand as much about insurance as possible. If you happen to have any questions about your bill or insurance benefits, Linda will try her best to answer all of your questions. Linda enjoys keeping up with her two young children outside of the office!