About Our Celina Office

Mercer In-Sight Family Eye Care is formerly Dr. Frank Tangeman’s office. Dr. Tangeman retired in the summer of 2016 after over 40 years of service to the Celina area. Mercer In-Sight Family Eye Care is located directly across from the Celina High School and has a parking lot behind the building.

Get to know our Staff

Marlene Sommer – Certified Paraoptometric
Marlene started working for Dr. Tangeman in 1973 when he first came to Celina, giving her 43 years of experience in optometry. She is a certified paraoptometric and is always happy to assist you with all of your eyecare needs. Marlene’s husband, Steve is also in the eyewear business as owner of Sommer Optical. They have two children, Andrew and Alyssa. Marlene is also the president of The Cancer Association of Mercer County and the founder of her own designer line T-shirts and a non-profit organization for cancer patients.

Joan Huelsman – Optometric Assistant
Joan has worked for Dr. Tangeman as an optometric assistant for 23 years. Prior to working for Dr. Tangeman, she worked at Lake Ophthalmic laboratory for 10 years as an optician. Like all of our staff, she also has Shamir Freeform Certification. She has been married to her husband Robin for 32 years. They have two children, Isaac and Jocelyn. They reside in Celina.

Haley Bretz – Optometric Assistant
Haley has been working Mercer In-Sight family since 2014. She is a Celina High School graduate as well as a Wright State Lake Campus graduate in which she earned her degree in Medical Assisting. She enjoys meeting with our patients and recently took over the roll of insurance billing for our VSP and EyeMed patients. Haley and her husband Jordan live in Celina with their daughter, Addison.

Emily Geier – Optometric Assistant
Emily has been working at Mercer In-Sight since 2015. She is our wonderful receptionist who primarily answers phones and checks in and out patients, and pre-screening throughout the day as well as helps on our optical side. Emily lives in Coldwater with her husband, Alex.

Beth Otte – Business Manager
Beth has been working for Mercer In-Sight since June of 2016. Beth is our Business Manager for all four of our locations. She is responsible for the operations and hr side of the practice’s. Beth lives in Celina with her husband, Dr. Chad Otte, and their two kids, Lucy and Beau.

celina staff

Location Photos

celina sign

Our Locations


  • 706 E Wayne St.
  • Celina, OH 45822

Phone: 419-586-2909

About Celina


  • 515 E. Main St. Suite B.
  • Anna, OH 45302

Phone: 937-639-2909

About Anna

Van Wert

  • 321 W Main St.
  • Van Wert, OH 45891

Phone: 419-238-5503

About Van Wert


  • 739 Spruce Ave.
  • Sidney, OH 45365

Phone: 937-492-1990

About Sidney