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Our Eye Doctors & Staff

The eye care professionals at Northwest Vision Center specialize in understanding how the human eye really works, as well as diseases and conditions that affect your vision – many of which do not have obvious symptoms. Eye doctors know how age and risk factors affect vision over time for young and old, and they understand the benefits and features of corrective lenses including eyeglasses and contacts.

Our optometrists take the time to explain the results of your eye exam, describe your options and listen to your eye care needs. Because maintaining good eye health is an ongoing partnership, we encourage you to ask questions and share your health information, which could be vital to monitoring, diagnosing and treating potential vision problems.

Meet Our Columbus Ohio Eye Doctors:


Dr. Yoongie E. Min

Dr. Min did his undergraduate work at Case Western Reserve University and The Ohio State University where he received a Bachelor of Science Degree in Biology in 1985. He then entered The Ohio State University College of Optometry from which he received his Doctor of Optometry Degree in 1989. During his graduate training, he served as class president for all four years and as student council president for two years. During his final year, the Ohio Optometric Association awarded him the Outstanding Senior Student Award. Dr. Min also received the Vistakon Award for Excellence in Contact Lens Care.

Upon graduation, Dr. Min joined Lakeland Eye Surgeons, a multi-specialty surgical and medical practice in Lorain, Ohio, where he gained intensive experience in surgical post-operative care, emergency eye services, and geriatric eye care. Dr. Min then returned to the Columbus area and opened Northwest Vision Center in 1991. In 1992, Dr. Min took over a practice in Chillicothe, Ohio and began splitting his time between both offices.

Dr. Min is very active in the Ohio Optometric Association. He has served as a trustee of the Central Ohio Optometric Association and has served on the Membership, Congress Planning, and Assistance to Graduates committees at the state level. He has also served as chairman of the Assistance to Graduates Committee. Dr. Min is also very active in the Ohio State College of Optometry Alumni Association and is the past President of that organization.

In his spare time, Dr. Min enjoys traveling, cooking and golf. Dr. Min has a special practice interest in laser vision correction and in fact, had his own eyes treated with the LASIK procedure. As a former contact lens wearer, he also enjoys fitting and prescribing all types of contact lenses.

Dr. Min resides in Hilliard with his wife Jacqueline and their two sons, Andrew and Alex.


Dr. Stephanie Sims

Dr. Stephanie Sims grew up in Dublin and graduated from Dublin Jerome High School. She attended The Ohio State University for her undergraduate studies majoring in biology and business. Throughout her undergraduate years, she was vice president of the Pre-Optometry Club, and volunteered as a Young Life Leader at Westerville North High School. It was while she was an undergraduate that she first joined the Northwest Vision Center staff as an optician and technician, learning the fundamentals of the eye care business.

While in her third year as an undergraduate, Dr. Sims received early admission to The Ohio State University College of Optometry. During optometry school, she was president of Optometry Ambassadors, and held leadership positions in Beta Sigma Kappa honor society and Fellowship of Christian Optometrists. She was also a member of the American Optometric Student Association. Dr. Sims has gained experience in cataract surgery co-management and Refractive Surgery co-management at Northeast Ohio Eye Surgeons in the Akron area. She also gained experience in ocular disease at the Columbus VA Care Center. Her experience in pediatrics, binocular vision, vision therapy, and contact lenses allows her to provide care to patients of all ages.

Once graduated, Dr. Sims was given the opportunity to become a partner and part owner of Northwest Vision Center, and decided that there was no other place she’d rather provide eye care to her patients.

Dr. Sims and her husband Matt, also a Dublin native and Dublin Jerome graduate, live in Powell where they are involved in Olentangy Liberty’s Young Life and are very active in their church. In her spare time, Dr. Sims enjoys spending time with family and friends, working out, cheering on the Buckeyes, and playing with her furry child, a puppy named Chandler.

Opticians & Staff

Our exceptional, friendly staff is our greatest asset. They are excited about what they do, and they care personally about getting the best results for our patients.

Our receptionists will try to accommodate your busy schedule by finding appointments that suit your needs. We will help you understand your insurance coverage and if financial arrangements are necessary, we will be glad to help you develop a plan to make your vision care treatment possible.


Kathy Cooper

Kathy grew up in Botkins, Ohio. She got her start in the optical business as a receptionist for 20/20 Vision Center in 1985. After a two year apprenticeship, she obtained her Optician's License in 1987. Since then, Kathy has gained experience in many aspects of the optical industry, ranging from optician, to office manager, to optical lab rep.

Kathy moved to California in 1993 where she managed the optical shop at Edwards Air Force Base. In 1997, she moved back to Ohio and managed Northwest Optical for 10 years. After this position, she spent several years as an outside sales rep for Hoya Vision in the Cincinnati area. Kathy then moved back to the Columbus area and started her career at Northwest Vision Center in September of 2016.

Kathy is married to her husband Jim and has three children; Brad, Craig, and Chloe. She also has one granddaughter Kyla. In her spare time, Kathy enjoys crafting with her sisters, taking care of her two dogs, Max and Maggie, and spending as much time as possible with her granddaughter.


Taylor Merullo

Taylor grew up with a large extended family in Upper Arlington. After graduation, she spent nine years teaching young children at Burbank Early Childhood School. Needing a change, Taylor joined Northwest Vision Center in June of 2017 as an Optometric Technician. She values connecting with patients, helping them achieve their best vision, and eye health. She is currently working to become a Certified Paraoptometric Technician, and learning from the experienced veteran doctors and staff at Northwest Vision Center.

In her free time Taylor travels with friends and family, goes to concerts, spends time outdoors and finds the best restaurants in the city. She supports the National Brain Tumor Society, and the Defeat GBM Research Collaborative.


Hope McCloskey

Hope joined Northwest Vision Center in February 2009. She enjoys singing and attending rock concerts and musical plays. She loves to travel, especially to France and beach destinations.

Hope has two kids, Drew and Sarah. She also welcomed her first grandchild, Edith Hope (Edie), in January 2017. She loves to shop and buys too many shoes, earrings and eyeglasses! She’s working in the right place.


LeAnn Gelter

LeAnn moved to the Columbus area in November 2006 and began working at Northwest Vision Center as the Office Manager. She previously lived in Chillicothe, Ohio for 28 years where she raised her two daughters, Stephanie and Amber.

Her previous work experience includes over sixteen years in the banking industry, including Oak Hill Banks and Fifth Third Bank where she was Assistant Branch Manager and Office Manager respectively.

She is a graduate of Hillsboro High School and attended Ohio University. LeAnn lives in Westerville, Ohio with her husband, Dale, and their two Cavalier King Charles’s, Dakota and Titus. In her spare time LeAnn enjoys shopping, traveling, working on home projects and spending time with family including grandchildren Bella, Sophia, Grayson and Olivia.


Jan Pepper

Jan joined Northwest Vision Center as an Optician/Eyewear Consultant in 2014.  Prior to joining Northwest Vision Center, Jan worked as an Optician for a private Optometry practice for five years, and has two additional years of experience working as an apprentice optician for an eyewear retailer.  Jan is a Medical Assistant and has attended Columbus State Community College.  Jan strives to provide each patient with excellent customer service.

Jan currently resides in Upper Arlington along with her husband of 31 years, Jim.  She and her husband have a 26 year old daughter, Erica.  Jan enjoys spending time with her family and spoiling her boxer, Emmy.  Jan also spends her free time volunteering at Highbanks Metro Park, birding, reading, and following the Columbus Blue Jackets.


Karla Hagman

Karla grew up in Sunbury, Ohio and after high school graduation, her father’s job took her and her parents to Venezuela for a year. From there, they were transferred to Okinawa, Japan where Karla lived for three years working for and attending the University of Maryland, Far East Division.

Upon returning to the Columbus area she started her career with Ohio State Optical Company as a receptionist. After just a short while, Karla moved into the business office and managed many of the administrative operations. By the mid-1980’s, Karla began her apprenticeship in optical dispensing and earned her opticians license in 1987 as well as being certified by the American Board of Opticianry. Karla continued as a licensed optician with Ohio State Optical until February 2019, at which time she joined Northwest Vision Center.

Over the years Karla has developed a keen eye for eyewear styling, dispensing, frame buying and brings with her much experience in the optical industry. Karla and her husband of 37 years, Bob, reside in Powell. They have twin son Ben and Brady. She loves spending time with her family, traveling and gardening.


Katelin Herron

Katelin is originally from Washington Court House, Ohio, but moved to Hilliard in 1999, and has lived there since. She graduated from Marion Technical College in 2018 and has an Associates of Business Management degree with a Real Estate Option.

Katelin enjoys interacting with patients while helping them achieve their vision goals. In her free time, she likes to travel with friends and family, including her five younger siblings. She is also an avid animal lover and spending much of her free time with her beloved dog, Bella.


Cortney Doyle

Cortney grew up in Lewis Center, Ohio. She attended and graduated from Columbus State Community College with an Associate of Arts degree. Cortney decided to take her love of animals into the veterinary field where she worked as a Veterinary Assistant and Receptionist for five years. Cortney decided to take her interest in the medical field to the human side which brought her to Northwest Vision Center!

In her spare time Cortney enjoys going to concerts, fairs, and festivals. When she’s not traveling around you can find her hanging out with her family and her three dogs, Lilly, Tiger and Grayson.


Jackie Eichhorn

Jackie joined Northwest Vision Center in August of 2019. She started working in the optical field as a patient coordinator in 2016. From there she became an optician apprentice for two years before taking and passing the National Optician Competency Exam in May of 2019. She was drawn to the field because she loves finding fun frames that people enjoy wearing, match their style and fit their personality. Learning about new frame styles and lens technology is also exciting and something that she enjoys a lot about her job.

Jackie grew up in Pickerington, Ohio and currently lives in Columbus. In her free time she loves being outside kayaking, reading in her hammock or hiking. She also loves traveling with friends and finding new restaurants around the city!