• Joan Ploem Miller
    Optometric Physician

    Dr Joan Ploem Miller was born in Indonesia where her Dutch parents had a plantation. When Indonesia became independent her family immigrated first to The Hague, Netherlands and then to Hillsboro, Oregon. She became focused on optometry as a career at age 13 when she learned she was nearsighted. She was a dedicated student and graduated from Pacific University College of Optometry with distinction. She received awards there for the research she did that helped the first extended wear contact lenses get FDA approved. She started her own private practice of optometry in 1979 and was an adjunct faculty member at Pacific for years. She is become well-known for her caring and thorough approach in solving patient problems. in 2002 Dr. Miller was names Oregon optometrist of the year. She founded a group called OD Divas which includes nearly 6000 females in optometry on Facebook. She received a Women in Optometry Theia award in the Influencer category in 2019. She has been a leader in optometry, serving on the Oregon Board of Optometry 13 years and was President of that board for 7 years. She also helps the National Board of Examiners in Optometry write the tests optometrists take prior to practicing optometry. For more than four decades she has been a leader in using the latest technology and research to benefit her patients. She has taken care of patients as young as three months and as old as 108 years. Her optometry practice encompasses a broad range with major emphasis in treating and preventing eye disease. she educates her patients about everything from glaucoma and preventing macula degeneration to providing long lasting comfort for dry eyes and optimizing contact lenses for long term success.

  • Sarah Olmschenk
    Optometric Physician
    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. Dr. Olmschenk has a young daughter and son of her own, and loves every minute spent watching them grow up.
  • Olga Merecias
    Optometric Technician
    Olga is our lead optometric technician. She joined our office in 2011 with many years of customer service experience with a major bank. She is skilled with all our high-tech equipment and has the perfect personality to help patients feel at ease. She received special training to obtain both paraoptometric and paraoptometric assistant certifications. A graduate of Diopsys University, she is our lead electrophysiology tech performing ERG and VEP Vision Testing. She also provides translation services for our Spanish-speaking eye care patients. In her free time, Olga enjoys being mom to her young son and spending time with family.
  • Maritza Maya
    Optometric Technician

    Maritza is one of our skilled technicians and joined our eye care team in 2016.  She genuinely enjoys people and will take the time to accommodate your needs and make you feel comfortable during your visit.  Being passionate about helping others is what makes her an ideal team member. She is fluent in Spanish and gladly provides translation services. Maritza graduated from Eastern New Mexico University with a BS in Criminal Justice. When she is not in the office she loves spending time outdoors or with her family.

  • Peggy Ploem
    Financial Officer

    Peggy is our longest standing employee. Starting in 1979 she has served in many different roles. Her primary responsibilities are accounts payable, banking, post office and dealing with taxes. She also alters scrubs, provides financial and other counseling services to staff and is mom to Dr Miller. In her free time she teaches three knitting classes, knits helmet liners for our troops and is active at the Old Scotch Church.

  • Peggy Jean Moore
    Peggy Jean is our trusted behind the scenes assistant. She uploaded three decades of paper charts and made them easy to access electronically. She continues to upload records and invoices to make us efficient. She is a master quilter, avid reader and enjoys travel.

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Hours of Operation

Hillsboro Office


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-5:00 pm


Closed - Medical Eye Emergencies Call Or Text (503) 730-2007 Or (503) 628-9273


Closed - Medical Eye Emergencies Call Or Text (503) 730-2007 Or (503) 628-9273