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Focused on Your Health

Our Doctor Team

Passionate about patient care

From our optometrists to our office staff, the experts at IEC care about you and your health. We are dedicated to delivering a high-quality, comfortable experience with doctors you can trust.

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Meet our doctors.

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Dr. William Adler

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A native of Iowa, Dr. William R. Adler completed his undergraduate degree at Simpson College in Indianola, IA. He received his Doctorate of Optometry Degree from the Illinois College of Optometry in Chicago and began practicing in 1973. Dr. Adler worked for an optometrist in his home town during high school who later talked him into going to Optometry school. After earning his doctorate, Dr. Adler purchased his doctor’s optometric practice. He has been with IEC since 2015. Dr. Adler likes the medical side of Optometry and enjoys interacting with people.

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Dr. Daniel Alletto

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Dr. Daniel Alletto received his Doctorate of Optometry from Pacific University, Forest Grove, Oregon, where he graduated with distinction. He completed his undergraduate degree at Brigham Young University, Provo, Utah. Dr. Alletto became an optometrist because he loved going to his optometrist’s office when he was growing up. Dr Alletto wants to help his patients see well and have a great experience. He feels rewarded in helping someone see clearly when they expected their vision could never improve. Dr. Alletto particularly enjoys fitting patients in specialty contact lenses, “because I can often take someone’s vision from just being OK to very good.”

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Dr. Michael Benedict

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Dr. Michael Benedict received his Doctorate of Optometry from Indiana University School of Optometry, Bloomington, IN. He completed his undergraduate schooling from the University of Missouri, Columbia, MO. Dr. Benedict knew he wanted to be an optometrist since high school and began his career as an optometric technician at IEC in Hannibal in 2008.
He followed his passion for caring for patients working with IEC doctors as he completed his Optometric degree and licensure. He began practicing optometry at IEC in 2013. Dr. Benedict’s favorite part is being able to see and treat systemic issues just by viewing the retina.

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Dr. Mindy Blackford

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Dr. Mindy M. Blackford received her Doctorate of Optometry at the Northeastern State University College of Optometry, Tahlequah, OK in 2006. A native of northeastern Missouri, she completed her undergraduate degree at Truman State University, Kirksville, MO.
Dr. Blackford serves as President Elect on the Missouri Optometric Association and in 2014 was named MOA Young OD of the Year. She decided to become an optometrist to help people see better. Dr. Blackford states, “eyecare is usually one of the happier sides of healthcare.”

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Dr. Ronald Brand

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Dr. Ron Brand was awarded his Doctorate of Optometry from Illinois College of Optometry, Chicago, IL, in 1985. He completed his undergraduate studies at Illinois State University. A native of Peoria, IL, Dr. Brand began practicing optometry at International Eyecare Center in Kirksville, Missouri, in 1985. Dr. Brand’s interest to become an eye doctor began early. “When I was 10, I accompanied my mother to our optometrist for her checkup. He checked her blood pressure and we went from that office directly to her primary care physician, and on to the pharmacy for hypertension medicine. Even at 10, I could tell that optometrists really made a difference.”

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Dr. Kristie Chevalier

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Dr. Kristie Chevalier received her undergraduate degree in biology at Illinois College in Jacksonville, IL. She earned her Doctorate of Optometry at the New England College of Optometry, Boston, MA. After completing her residency in Kansas City, Dr. Chevalier began practicing optometry in 2000. She joined IEC in 2005.
Dr. Chevalier became an optometrist because she wanted to help people and make a difference in someone’s life.
She finds the most rewarding part of being an optometrist, in addition to helping patients with their eye problems and needs, is learning a person’s story. She likes to hear about their families, their jobs, their hobbies.

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Dr. Thomas Johnson

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Dr. Thomas Johnson received his Doctorate of Optometry at Southern California College of Optometry in Fullerton, California. An Iowa native, he completed his undergraduate degree at Iowa State University, and achieved a Master’s Degree in Education from the University of Iowa. Dr. Johnson has practiced optometry in Centerville since 1994 and continued when his practice became part of IEC in 2013.
Growing up, Dr. Johnson loved school and was a science nerd. After his military service, he was a science teacher. The GI bill provided the opportunity for him to become an optometrist. Now, Dr. Johnson enjoys seeing his patients in his hometown practice and hearing about their personal stories.

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Dr. Austin Krohn

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Dr. Austin Krohn received his Doctorate of Optometry from Southern College of Optometry, Memphis, TN. He completed his undergraduate degree in biology from Truman State University in Kirksville, MO. Dr. Krohn is ACMO certified (advanced competency in medical optometry). “The reason I became an optometrist is because I had a higher prescription as a child. Getting glasses and contact lenses made a huge difference in my school and athletic careers. I like fixing problems. I enjoy determining the cause, finding the solutions, and figuring out which solution would work best for each individual. It’s rewarding knowing that when we do a good job, it impacts literally every day of that patient’s life whether they know it or not.”

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Dr. Tim Leahy

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Dr. Tim Leahy completed his undergraduate degree from Augustana College in Rock Island, IL. He received his Doctorate of Optometry from Illinois College of Optometry in 1993, graduating cum laude. He joined International Eyecare Center the same year.
Growing up, he had a great optometrist who opened the door to a career in optometry. Dr. Leahy truly enjoys helping people see better and is pleased that he chose a career that allows him time to spend with his family.

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Dr. Jason McDowell

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Dr. Jason McDowell earned his Doctorate in Optometry from the University of Missouri School of Optometry in 1998. He attended Hannibal LaGrange University, Hannibal, MO for his undergraduate work. Dr. McDowell began practicing optometry in the Hannibal-Quincy area prior to joining IEC in Jacksonville in 2001.
Dr. McDowell had an eye problem in the 9th grade, and his entire experience sparked his interest in becoming an eye doctor. He enjoys getting to know his patients and helping them to see well.

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Dr. Elizabeth Monroe

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Dr. Elizabeth Monroe received her Doctorate of Optometry at Indiana University School of Optometry, Bloomington, IN. She graduated Cum Laude from Southern Illinois University-Carbondale with a degree in physiology. “I always knew I wanted to do something in the medical profession; I wanted to help people live their best life. When I discovered optometry, I knew it was the right fit for me. The most rewarding part of being an optometrist is helping people see the world in a new way. It’s truly amazing to help a patient see road signs again or be able to read their favorite book. It can change a person’s life and I love that I can be a part of that.”

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Dr. Kenneth Mueller

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Dr. Ken Mueller earned his undergraduate degree from Millikin University in Decatur, IL, graduating Magna Cum Laude. He joined IEC after receiving his Doctor of Optometry from Indiana University in 1990 where he earned recognition for his original research in the area of contact lenses. After deciding to become a doctor, he changed his focus from surgery to optometry. Being in a small community, really knowing his patients and their families, and being able to serve their eyecare needs is meaningful to Dr. Mueller. He finds optometry tremendously rewarding, being on the forefront of medical care and technology for his glaucoma and macular degeneration patients and helping to ensure their good vision for a lifetime.

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Dr. Katherine Osborn

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Dr. Katherine L. Osborn received her Doctorate of Optometry from the University of Alabama at Birmingham School of Optometry. She graduated Cum Laude with a Bachelor of Arts from Central College in Pella, IA.
Dr. Osborn feels that optometry allows her to be a doctor and also have a flexible schedule to raise her family – in her opinion that’s a win-win. As a Clinical Director for the Special Olympics in Missouri, she runs screenings through the Special Olympics- Lions Club International Opening Eyes which is part of the Healthy Athletes initiative. Dr. Osborn states “this volunteering opportunity leaves me fulfilled while making an impact on many special athletes in Missouri.”

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Dr. Jonathon Thoele

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Dr. Jonathon Thoele completed his undergraduate degree at Quincy University and received his Doctorate of Optometry from Illinois College of Optometry, Chicago, IL. He began practicing optometry at IEC in 2012.
Dr. Thoele finds optometry to be a “family friendly” career choice. One of his favorite parts of his profession is when a child gets excited to be seeing clearly with new glasses for the first time in his/her life.

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Dr. Ryan Thoele

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Dr. Ryan Thoele graduated from Quincy University with his undergraduate degree in biological sciences. He earned his Doctorate of Optometry Degree at the Illinois College of Optometry in Chicago, IL. After completing his residency in 2012, Dr. Thoele joined IEC to begin practicing optometry. He finds the most rewarding part of being an optometrist is to provide the proper spectacle correction for his patients, especially children, and then be able to witness their first reaction to seeing clearly.

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Dr. Derek Vogelpohl

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Dr. Derek Vogelpohl received his Doctorate of Optometry from Illinois College of Optometry, Chicago, IL, Summa Cum Laude and Salutatorian of his class. He earned his undergraduate degree in Chemistry at the University of Illinois, Urbana-Champaign. Dr. Vogelpohl worked at IEC as an optometric technician during college; he began his optometric career at IEC in 2013.
His favorite part of optometry is getting to know his patients and helping them to preserve and maintain their vision and eye health.