Highlights
Age Groups Seen
- Adult
Languages
- English
Gender
MaleLocations
- Cole Eye Institute, North Ridgeville
- 35105 Center Ridge Road, N Ridgeville, OH 44039
- Get Directions
- Elyria Family Health Center
- 303 Chestnut Commons Drive, Elyria, OH 44035
- Get Directions
Education & Board Certifications
Education
- Medical Education: The Ohio State University College of Optometry, 2002
- Undergraduate: Bowling Green State University, 1997
Research & Publications
See publications for this provider. (Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)
Industry Relationships
Cleveland Clinic physicians and scientists collaborate with industry to advance medical breakthroughs. These partnerships help commercialize discoveries for public benefit while maintaining scientific integrity. To ensure transparency and minimize potential bias, Cleveland Clinic reviews these relationships and publicly discloses when physicians/scientists receive significant compensation for consulting, serve in fiduciary roles, receive royalties, or hold equity interests related to their work. We manage potential conflicts through approval processes, annual reporting, and targeted management plans.
As of 2026-03-20, Dr. Kosunick has reported no financial relationship with industry that is applicable to this listing.
In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.
Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.
* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.
Insurances Accepted
Ratings & Reviews
4.9 out of 5
385 ratings, 43 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- 5 out of 5 starsReviewed on 4/6/2026
Excellent physician...very thorough... Shares findings in a conversational way and easy to understand the plan of care. I trust in him and his diagnostic abilities.
- 5 out of 5 starsReviewed on 3/23/2026
I have been seeing Dr. K for over 10 years. He always anwers my questions and is very thorough. That''s why I go to him.
- 5 out of 5 starsReviewed on 2/23/2026
Very pleased with Dr.K
- 5 out of 5 starsReviewed on 2/23/2026
Dr. K very professional caring . Ca talk to him about all aspects of my eye poblem . Wollin gto help and assist me alll he can to get me the best care for my eye needs. Said call him or message. Him any time to address my concerns about how to move forward with treatments . A real genuine and caring doctor .
- 5 out of 5 starsReviewed on 2/23/2026
I have some medical issues relating to my vision and Dr Kosunick takes the time to listen to me as I describe these issues and how they affect my vision. He then takes the time to come up with unique solutions.
- 5 out of 5 starsReviewed on 2/16/2026
What I really like about this provider - my routine eye exams with previous providers were quick and cold. This provider listens to my concerns (family history glaucoma and macular degeneration), explains how genetics plays part. Also, shows me pictures and explains ways to improve eye health. He is not rushed.
- 5 out of 5 starsReviewed on 2/10/2026
Dr. Greg is top notch.
- 5 out of 5 starsReviewed on 2/10/2026
I have and continue to recommend Dr. Greg to any and all who need professional and caring eye care.
- 5 out of 5 starsReviewed on 1/26/2026
Doc is always very informative about issues/meds. He prints info out about issue for you
- 5 out of 5 starsReviewed on 1/9/2026
The Dr., explained everything in great depths that In words I understood and I appreciated that.
- 5 out of 5 starsReviewed on 12/29/2025
Dr. Kosunick is a professional in every sense of the word. He talked to me in language that I could understand and explained the fine details of my exam. I feel 100% confident in his abilities and would highly recommend him to anyone.
- 5 out of 5 starsReviewed on 12/29/2025
The experience with Dr. Gousnick is wonderful. He is one of the best doctors I have ever met.
- 5 out of 5 starsReviewed on 12/29/2025
He is a wonderful Doctor.
- 5 out of 5 starsReviewed on 12/18/2025
He is a very good Dr in every way and a big asset to the Clinic.
- 5 out of 5 starsReviewed on 12/8/2025
The Dr always is top notch. Lets me know exactly what's going on and what I need to watch for. Seeing him for years. Great experience
- 5 out of 5 starsReviewed on 12/8/2025
Dr. K is great! He really takes time to compare previous year's tests with current information and does what is best for the patient. He's been my doctor for over 10 years and I trust his judgement completely.
- 5 out of 5 starsReviewed on 12/2/2025
Dr. Kosunick is an exceptional doctor - kind, patient, knowledgeable and takes a great deal of care.
- 5 out of 5 starsReviewed on 12/2/2025
I'm glad I got to see Dr. Kosunick.
- 5 out of 5 starsReviewed on 12/2/2025
Appreciate my doctor very much
- 5 out of 5 starsReviewed on 11/20/2025
I asked the doc a specific question and he spoke to me about it and went on line and showed me what he suggested I take to possibly help prevent my concern
- 5 out of 5 starsReviewed on 11/20/2025
Dr. Kosunick is always thorough, professional and courteous. I feel confident he has my best interest in mind and he does everything to help me care for my eyes and my sight.
- 5 out of 5 starsReviewed on 11/7/2025
Dr Kosunick was excellent. He listened and gave me great feedback and advice. I have already recommended him to others.
- 5 out of 5 starsReviewed on 10/23/2025
I already recommended this doctor. I like how he listens to me. He always answer my questions.
- 5 out of 5 starsReviewed on 10/23/2025
I have already recommended him to a friend.
- 5 out of 5 starsReviewed on 10/23/2025
I want to say that this Doctor cares! He was typing and stopped typing to answer my question. Very attentive with me. He answers all my questions and informs what could happen to my eyes if I dont get my blood sugar under control. He tells me what he is looking at and so far its been a good visit on my part. He tells me if things are happening to my eyes. He is also very patient with me.
- 5 out of 5 starsReviewed on 10/16/2025
My PA was very kind. She worked with me and walked me through it everything she was doing since this was my first eye exam.
- 5 out of 5 starsReviewed on 10/16/2025
Dr Kuosnick was awesome
- 5 out of 5 starsReviewed on 10/10/2025
I always have a productive visit. The Dr is forth coming and a through.
- 5 out of 5 starsReviewed on 9/24/2025
Highly recommend this doctor!
- 5 out of 5 starsReviewed on 9/24/2025
Highly recommend this doctor and staff
- 5 out of 5 starsReviewed on 8/20/2025
Excellent Doctor
- 5 out of 5 starsReviewed on 8/19/2025
The doctor was fantastic! I was very happy with the service I received during my appointment.
- 5 out of 5 starsReviewed on 8/12/2025
This physician was outstanding in both care and personality.
- 5 out of 5 starsReviewed on 8/12/2025
This is a very good caring personal doctor. He tells everything with pictures and simplistic explanations.
- 5 out of 5 starsReviewed on 8/4/2025
Very personable Doctor
- 5 out of 5 starsReviewed on 6/26/2025
Had not seen Dr. Kosunick before as he is not my regular ophthalmologist. He performed a very thorough exam and provided excellent analysis.
- 5 out of 5 starsReviewed on 6/23/2025
I like doctor's professionalism and courtesy.
- 5 out of 5 starsReviewed on 6/23/2025
Met Dr Kosunick in 2021. I keep getting scheduled with him - and I couldn't be happier
- 5 out of 5 starsReviewed on 6/23/2025
Dr Kosunick is superb!
- 5 out of 5 starsReviewed on 6/23/2025
Doctor showed a personal interest in my exam and results. Explained everything.
- 5 out of 5 starsReviewed on 6/23/2025
Dr. Kosunick is a wonderful doctor!
- 5 out of 5 starsReviewed on 6/9/2025
He knew everything to know about my issue and helped me and gave me hope for the future. Wry down to earth guy. I will send my family members to him as well as friends.
- 5 out of 5 starsReviewed on 5/22/2025
Dr. Kosunick gave me more information about my eye issues than any other Ophthalmologist I've seen my entire life, and I appreciqte it!