Welcome to Baseline Vision Clinic

Welcome to Baseline Vision Clinic in Hillsboro. Our optometrists and the Baseline Vision Clinic team strive to provide the best in optometry services. We invite you to browse our website to learn more about our optometry services and join our patient family by scheduling an eye exam appointment.

Baseline Vision Clinic is a full service eye and vision care provider, accepting both eye emergencies as well as scheduled appointments. Patients throughout the area come to Baseline Vision Clinic because they know they will receive the personal attention and professional care that is our foundation. Our optometric physicians and our team are dedicated to keeping our patients comfortable and well-informed at all times. At Baseline Vision Clinic, we will explain every exam and procedure and answer all of our patients' questions. Additionally we offer vision financing options and will work with vision and medical insurance providers to ensure good eye health and vision care for all of our patients.

Our Approach to Optometry

Our one-on-one approach to optometry makes our doctors and the Baseline Vision Clinic staff the eye and vision care providers of choice in the Hillsboro area. We offer the following services: complete eye exams, contact lenses, glasses, glaucoma testing and management, macular degeneration testing and management, and pre- and post-operative care. For a complete list of services, visit our services page or call our office at (503) 648-8328.

At Baseline Vision Clinic, we are dedicated to providing high-quality optometry services in a comfortable environment. Call us at (503) 648-8328 or schedule an appointment today online.

Joan Ploem Miller, OD & Sarah Olmschenk, OD
Optometrists | Baseline Vision Clinic | (503) 648-8328
527 SE Baseline Street Suite B
Hillsboro, OR 97123

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Free imaging (with exam, $150 value) for new patients

Meet The Staff

Learn Who We Are

  • Kacy Evans
    Billing manager

    Kacy joined our office in 2021 after years of experience working in customer service. She has dedicated herself to helping our patients get the most out of their insurance benefits. When she is not working, she enjoys traveling with her partner and spending time with her two cats, Apollo and Atlas. A fun fact about Kacy is that she is getting married this September!

  • Bailey Strom

    Bailey is our lead Optician. She joined our team on Valentine’s Day in 2022. Having entered the vision world as a Optometric Technician, Bailey has spent the last three years honing her skills as an Optician. With an eye towards fashion, Bailey believes that eyewear doesn’t detract from your overall appearance, but rather elevates it. She loves helping patients find a pair of glasses that they actually want to wear. In her free time Bailey enjoys reading, making candles, and continuously proving her friends and family wrong when told that she couldn’t possibly find enough space for another houseplant.

  • Paige Lamb
    Administrative assistant

    Paige joined the team in late 2021 and currently works at the front desk. With 10+ years of customer service experience, she hopes to make your visit to our clinic as welcoming and comfortable as possible. When she is not in the office she can be found studying for a certification in IT support, or at home playing video games with her boyfriend and their cats.

  • Jayne VanSyckle
    Optometric Technician

    Jayne's current role at Baseline Vision Clinic is Optometric Technician. She has worked as an Optometric Technician for approximately two years. While working for Baseline Vision Clinic Jayne is attending Portland Community College for an ASL medical translator degree & minor in Medical billing & coding.  While not working Jayne loves spending time with her partner Kyle and their dog Oliver. One fun fact about Jayne is that she loves dinosaurs.

  • Laney Jones
    Administrative Assistant

    Laney is one of our receptionists and joined Baseline Vision Clinic in 2021 after being a stay-at-home mom for most of the previous six years. Friendly and skilled in customer service, she helps assist with scheduling and patient care. Laney’s spare time is spent taking care of her 6 year old son, 3 cats, and 1 dog, with crafting and DIY mixed in.

  • 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 Sanchez 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 Perez
    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.


Reviews From Our Satisfied Patients

    Thank you Dr. Sarah and her staff are great. Very pleasant and professional everybody. They have a very cutting edge equipment to see your eyes from every angle. Even from the inside-out. Dr. Sarah was very patient and sure that I understood all she was saying to me. She gave me back hope that my eyes will be like 20 years ago. Very grateful.


    Hands down this is the best customer service I've experienced in my life. On top of that, the optometrist was very knowledgeable, courteous, and thorough. Dr Sarah Olmschenk was da bomb. If you are looking for a change with your optometry, I highly recommend Baseline Vision Clinic. Everyone in the office were super and helpful as well. Their optician was just as awesome!

    T. D.

    The best Vision Clinic I have ever been to. Everyone is very professional. They have the most advanced equipment available today. I highly recommend Baseline Vision Clinic.


    We choose Baseline Vision and Dr Miller because she cares about eye health as well as vision. She's up to date on the latest research and practices, the staff are friendly and efficient.

    Janet O.

    Dr.Joan is amazing! Met with a scratched eye a few years ago..she has taken great care of my eyes and condition I have ever since! Love her!

    Holly G.

    Probably the most thorough and comprehensive eye care I've ever had! They have the latest state of the art equipment for diagnosing any eye problems and prescribing the best in eye wear.

    Shelley R.

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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