Zachary M. Oswald, O.D.


Dr. Oswald purchased Precision EyeCare and Optical from Dr. Kepp in July of 2018.

Dr. Oswald is from Idaho Falls and graduated from BYU-Idaho. He has lived in Argentina, is fluent in Spanish, and was a member of the national collegiate Hispanic honor society. He was also a member of the international optometric honor society each year that he attended Southern College of Optometry in Memphis, Tennessee, and graduated Cum Laude. He was a Who’s Who in American Colleges and Universities Award recipient in 2011. Dr. Oswald loves to work with children and co-authored a research paper entitled, “Barriers to Children’s Vision Care: a Survey of Parent Attitudes,” which was presented at the American Academy of Optometry in 2009. He is still an Ambassador for Southern College of Optometry.

After graduation, Dr. Oswald completed a residency in the areas of primary care, ocular disease, and surgical co-management at the Walla Walla VA Medical Center and Pacific Cataract and Laser Institute in Kennewick, Washington. He loves to learn and implement new technology and procedures in his practice. He is currently using new designs in contact lenses to help slow down the progression of blurred vision and heal diseased eyes. He can fit people in contact lenses who have been told previously that they could not wear them.

Doctor Oswald worked in Central Oregon from 2012-2016 in a primary care practice that also provided corrective surgeries such as LASIK. From 2016-2018 he worked with Family Vision in Idaho Falls, Idaho. He has volunteered with the Lion’s Club and the school districts in those communities. He is excited to join the community in Dillon, Montana, with his family. Dr. Oswald and his wife, Nikky, have 2 sons. They enjoy playing sports together as a family and Dr. Oswald loves coaching his sons’ sports teams. They also enjoy fishing, camping, and hiking.


Rena Janssen, CPO – Optometric Technician

Rena moved from Tennessee to Montana in 2014. She has two children and has been married to her husband for over 15 years. She enjoys outdoor activities, reading, writing, photography, and anything crafty. She has published Christian Romance books in her spare time. She attended Chattanooga State Technical Community College. She has her license in Cosmetology as well as diploma in Wildlife and Forestry Conservation. She has worked as a medical transcriptionist as well as receptionist.

She has been working at Precision EyeCare and Optical since 2015. She received her training as an Optometric Technician in accordance to the AOA standards and has received her certification as a CPOA, Certified ParaOptometric Assistant.

She loves the friendly and family-centered atmosphere in Southwest Montana. She is known as the “Sweet Southern Shorty” with the smile on her face that never passes up a hug.


Jessica Quinlan, CPO – Patient Care Coordinator

Jessica enjoys helping our patients in any way she can, but can most often be found working at the front desk. Since working at Precision Eyecare & Optical, she has also become a Certified Paraoptometric. Jessica lives in Dillon with her husband, Russell, and their dog Sage. She moved here from Southern Oregon to attend the University of Montana Western where she graduated with a Bachelor’s Degree. Jessica loves the Dillon community and all the outdoor activities the area has to offer. In her free time, she enjoys riding horses, exploring in the mountains, and taking Sage to the lake.


Jessie Glidewell- Optician

Jessie moved from Washington in 2013 to attend University of Montana Western. She graduated with a bachelor’s degree in Natural Horsemanship & Business. She is a great optician and insurance specialist. In her free time she enjoys riding horses, hiking, side by siding in the mountains with her fiancé, Nate, and taking the dogs out to the lake.

Jessie started working at Precision EyeCare and Optical in 2017. After taking a little over a year off from the office, she is back and so excited to be part of the team again. Jessie loves the optical and loves helping each person find the perfect pair of glasses.


Caitlyn Corso – Optician

Caitlyn joined our team at Precision EyeCare and Optical in 2018. She has a son, Aiden, and two dogs at home, Max and Rikki. Caitlyn is very personable, detail-oriented, and a quick learner. She is highly skilled optician and patient care coordinator.

She is also attending the University of Montana Western, majoring in Psychology with a minor in Statistics.  She is planning on going to graduate school to pursue a master’s degree in counseling, and possibly a PhD in psychology. She hopes to one day be a school psychologist.