Department Ophthalmology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon Yes
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus

Specialties & Treatments

Treatment & Services

  • Cataract Evaluations
  • Cataract Implant Surgery
  • Cataract Surgery
  • Eye Examinations
  • Lens Implant
  • Neuro-ophthalmic Evaluation
  • Neuro-Ophthalmology
  • Ophthalmic Surgery
  • Ophthalmology
  • Optic Nerve Sheath Decompression Surgery
  • Phacoemulsification
  • Strabismus Surgery
  • Temporal Artery Biopsy
View all 13 Treatment & Services +

Specialty in Diseases & Conditions

  • Cataracts
  • Optic Atrophy
  • Strabismus
View all 3 Specialties +


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About Gregory Kosmorsky, DO

Gregory S. Kosmorsky, DO, is a Staff Physician in the Department of Neuro-Ophthalmology at Cleveland Clinic Cole Eye Institute.

Dr. Kosmorsky's clinical interests include neuro-ophthalmology, strabismus, cataract surgery and refractive surgery. He has been named a "Best Doctor" by Cleveland Magazine (2007-2008).

He completed his DO at Philadelphia College of Osteopathic Medicine in Philadelphia, Pa., in 1979. Then he finished a rotating internship at Delaware Valley Medical Center, Langhorne, Pa., and a residency focusing on adult neurology at Temple University Hospital in Philadelphia, Pa. He completed two fellowships, the first in ophthalmology at Cleveland Clinic and a second one in neurology/ophthalmology at Washington University Medical Center in St. Louis, Mo.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Cleveland, OH USA

Fellowship - Washington University Medical Center
St. Louis, MO USA

Residency - Temple University Hospital
Adult Neurology
Philadelphia, PA USA

Internship - Delaware Valley Medical Center
Rotating Internship
Langhorne, PA USA

Medical Education - Philadelphia College of Osteopathic Medicine
Philadelphia, PA USA

Undergraduate - Temple University
Philadelphia, PA USA


  • Neurology
  • Ophthalmology

Specialty Interests

Cataract Surgery, neuro-ophthalmology, Refractive Surgery, Strabismus

Awards & Honors

  • Cleveland Magazine, Best Doctors 2007-2008
Research & Publications

Research & Publications

See publications for Gregory Kosmorsky, DO.

(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

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 10/3/2019, Dr. Kosmorsky 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.

Patient Satisfaction Reviews

458 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
4.6 out of 5
Explains 4.5
Courtesy, Respect & Concern 4.6
Patient Rating of Doctor 4.6

75 Patient Comments

Reviewed on Feb 27, 2020

Dr. Kos is a true professional and a friendly, nice guy.

Reviewed on Feb 20, 2020

Have already sent people to Dr. K. and his team!!!!!

Reviewed on Feb 18, 2020

I mistakenly came at a different time and Doctor Kosmorsky still made time to see me.

Reviewed on Feb 7, 2020

The physician spent a total of 3 minutes with me. His assistant did my entire exam.

Reviewed on Feb 4, 2020

Dr.kosmosky was wonderful as well as his technion. I was very satisfied and feel very confident about the Surgery.

Reviewed on Jan 30, 2020

excellent experience with doctor and staff

Reviewed on Jan 30, 2020

The Ophthalmology Dept is excellent. They are courteous, efficient and knowledgeable. Dr. Kosmorsky is a great professional! So glad I started seeing him.

Reviewed on Jan 24, 2020

poor Dr.Kimorsky displayed very little to no compassion during my visit to his Strongsville office. I felt my appointment was very rushed. Learning that you you have MS and losing nearly all of your vision is life changing and to have a Doctor care for you who lacks concern the way this Doctor did for me is disheartening and leaves you feeling defeated even when that may not be the case.

Reviewed on Jan 24, 2020

I felt rushed like my concerns did not matter. I felt the Dr. was a bit rude and could have been more empathetic

Reviewed on Jan 23, 2020

the doctor was knowledgeable about my potentially unique condition. He was also very personable.

Reviewed on Jan 16, 2020

I think the people in Dr. Gregory's office are very nice to everyone.

Reviewed on Jan 16, 2020

Dr Kosmorsky was outstanding. Melani was very pleasant and professional doing eye charts, etc prior to visit with Dr Kosmorsky. Ryan was helpful re potential surgery.

Reviewed on Jan 16, 2020

Dr Kosmorsky related very well to me

Reviewed on Dec 31, 2019

The entire process with this particular referral and Dr. was ineffective as was communications with different employees of the Cleveland Clinic pertaining to this appointment. Each employee provided conflicting information and when the Dr did finally appear, he was extremely curt and rude speaking to me as if I am ignorant and he was not informative nor helpful as he made it clear he DOES NOT see patients with my presenting referral. A complete waste of my time and why wasn't this figured out ahead of time based on my referral to a neuro opthamologist from my neurologist? Not one employee caught the error prior to my showing up at 7:05 which a nurse wrote that I checked in at 7:42 for my 7:30. That too was an error on behalf of the staff. I'm extremely frustrated with every facet of this particular Dr and staff at the Strongsville location.

Reviewed on Dec 31, 2019

We especially like Dr. Kosmorsky's understandable explanations

Reviewed on Dec 6, 2019

My mom was right Dr Kosmorsky is a very knowledgeable person.

Reviewed on Dec 5, 2019

the doctor was rude and wouldn't listen to what was wrong with me or take any time with me. I will not be going back to another Cleveland Clinic eye doctor.

Reviewed on Nov 25, 2019

We were disappointed in our appointment with Dr Kosmorski. His delivery of treatment information, coupled with his demeanor yand lack of regard for the patient's concerns about working with impaired vision seemed to reveal a lack of empathy for the patient. In discussing the treatment outcomes and prognosis of six nerve palsy, Dr Kosmorski was notably negative and conveyed that the patient should not expect a full recovery. His harsh delivery caused the patient's girlfriend to begin to cry during the visit. Both the patient and his girlfriend felt that Dr. Kosmorhski was simply comparing the patient to others ("other people are able to work fine with one eye") and wasn't relating to the patient as a full person from a place of empathy.

Reviewed on Nov 15, 2019

Dr. Kosmorsky was wonderful. He was straightforward but also had a sense of humor that impressed both myself and my son.

Reviewed on Nov 7, 2019

Great Doctor. Really great bedside manner.

Reviewed on Oct 11, 2019

Cleveland Clinic and Dr Kosmorsky are the only place and doctor that I will trust with my eyes.

Reviewed on Oct 10, 2019

I've always had a very good experience with both Cleveland clinic and Dr.kosmorsky

Reviewed on Oct 10, 2019

Dr. Kozlowski has been my doctor for several years and has always been very caring and with the first doctor that knew exactly what I was suffering from and was able to take care of it and keep it under control and I will continue with him as long as I'm able to

Reviewed on Oct 8, 2019

the doctor canceled on me twice before I got to see him on the third try.

Reviewed on Oct 8, 2019

Staff was caring and courteous, I was seriously unimpressed with the Doctor and would not recommend him.

Reviewed on Oct 3, 2019

will never go back to this doctor.

Reviewed on Sep 30, 2019

my experience was good with doctor and staff. very professional and polite.

Reviewed on Sep 26, 2019

efficient and friendly Doctor and staff

Reviewed on Sep 26, 2019

Awesome Doctor - I feel very fortunate and blessed to have him as my neuro opthamologist

Reviewed on Sep 26, 2019

I was very impressed with the facility as well as the Doctor and staff - I will recommend this to my friends and family.

Reviewed on Sep 26, 2019

Question No.3 should be Not Applicable. Didn't know how to skip it. Excellent experience with Dr. Kosmorsky.

Reviewed on Sep 26, 2019

Definitely would recommend Dr. Kosmorsky and his staff.

Reviewed on Sep 26, 2019

Great visit with Dr. Kosmorsky. Everyone associated with the Cleveland Clinic that interact with at the Southpark shopping center are helpful, courteous and couldn't be friendlier.

Reviewed on Sep 24, 2019

Dr. Komonsky was professional and respectful. He listened to me, asking clarifying questions and making decisions based on my information. He was efficient and personable. He went beyond the expectations for helping me.

Reviewed on Sep 19, 2019

Dr. Kosmorsky and his team do a very thorough/efficient exam.

Reviewed on Sep 19, 2019

Good experience & Dr. Kosmorsky is great!!!!!

Reviewed on Sep 17, 2019

Dr Kosmorsky is the best eye doctor I've ever had. He is honest, down to earth, and knows his stuff. He saved my vision. He's a true miracle worker!!!

Reviewed on Sep 6, 2019

Provider was very nice, but the time he took to help me understand what is wrong with my eye was very little and rushed. I've had issues with my eyes for 2 mths now and to have such a short visit and still not have any answers or get the relaxed time to ask them because my appointment was squeezed in is very unsettling.

Reviewed on Sep 3, 2019

Dr. Kosmorsky and staff the BEST !!

Reviewed on Aug 29, 2019

*Dr. Kosmorsky is very through in his care and answering any questions clearly.

Reviewed on Aug 26, 2019

I especially, felt at ease with the Doctor. He treated me with respect and he was down to earth.

Reviewed on Aug 6, 2019

was a good experience first time with this provider . was very different from past provider.

Reviewed on Jul 19, 2019

he's a great provider, good listener. on time seeing me, and courteous.

Reviewed on Jul 15, 2019

Dr. Kosmorsky has a great reputation, so maybe he was just having an off day. He jumped to a conclusion on my condition and didn't seem to want to discuss it at all. "Go see this other guy" was about the extent of it.

Reviewed on Jul 11, 2019

This was the worse experience I have ever had with a doctor. I am so discourage. He acted like he was to busy to give a care on what was going on with me. I wouldn't recommend him to anyone!! I am seeking another opinion from another hospital due to his disrespect of my concerns and my family physician concerns!! This guy shouldn't even have a license to practice!! I've never been so frustrated and disappointed after leaving an appointment with someone who calls themselves a professional!!

Reviewed on Jul 9, 2019

great dr and staff. he did both lense replacements. even as busy as he has to be he takes the time to go over any ossues.

Reviewed on Jul 2, 2019

Dr. Kosmorsky is always professional but friendly during my appt. you can feel his confidence in his knowledge to treat my medical problem.

Reviewed on Jul 2, 2019

I've been seeing Dr. Kong since my first strike in 1999. He has always treated me with respect and kindness.

Reviewed on Jul 2, 2019

After seeing other doctors I was referred to Dr. Kosmorsky. I had been having migraines since July 1998 and I needed help desperately. The doctor ordered tests for me and then diagnosed the problem. He treated me there and it was like a cover of darkness was lifted and the headache receded. it does return but I can have the treatment and then zi'm good for a couple of months.

Reviewed on Jun 25, 2019

Dr. Kosmorski and his staff did an excellent job of treating my condition.

Reviewed on Jun 20, 2019

My experience with Dr Kosmorsky & his staff was very positive. I felt that I was kept informed and was treated very professionally.

Reviewed on Jun 20, 2019

Dr Kosmorsky was excellent as usual-you are fortunate to have him at clev clinic.

Reviewed on Jun 6, 2019

Felt rushed, physician left any questions to an assistant

Reviewed on Jun 4, 2019

I was very fortunate to get in to see Dr. K as quickly as I did due to a cancellation.

Reviewed on Jun 4, 2019

The doctor was very funny help me relax and gave me only good information

Reviewed on Jun 4, 2019

Dr. is awesome. I feel BLESSED. to have him to look after me.

Reviewed on Jun 3, 2019

Exceptional experience with the facility and especially with Dr. Kosmorsky at the eye institute.

Reviewed on Jun 3, 2019

Dr. Kosmorsky and his staff are top notch.

Reviewed on Jun 3, 2019

I would not hesitate for one second to recommend Dr. Kosmorsky, his staff or the Clinic to anyone.

Reviewed on May 30, 2019

my overall experience with this doctor was horrible. I was in quite a bit of pain during the procedure . he couldn't wait to get out of the room when he told me debris was left in My eye.

Reviewed on May 21, 2019

Waited 45 min. to see doctor

Reviewed on May 9, 2019

Dr. Kosmorsky is the very best

Reviewed on May 6, 2019

Dr. Kosmorsky always listens to my concerns and answers all of my questions. He makes me feel at ease and encourages me to control what I can control. He truly cares about his work and his patients.

Reviewed on Apr 22, 2019

Dr Kosmorsky did not offer any time or suggest discussion of implications of his diagnostic conclusions, treatment options, and did not offer appropriate next steps. granted, I did not ask, but thought that would be a natural result of such a conclusion.

Reviewed on Apr 4, 2019

I will never come back to this doctor again. the visit started out well until he came in. He asked me how I was doing. before I could answer he said " that's good'. he clearly doesn't have a desire to listen to his patients, let alone treat them with respect.

Reviewed on Apr 4, 2019

Dr. did not tell me what he saw on the abnormal OCT. He just told me to see a retinologist. I would have liked to know what he did not see as serious, and also what the reasons were that he recommended a consult with a retinologist. All he told me was that there was no neuro problem.

Reviewed on Mar 28, 2019

dr K was rushed

Reviewed on Mar 26, 2019

doctor was awesome and had a great sense of humor

Reviewed on Mar 14, 2019

Provider was great. He addressed my concerns and answered my questions on an equal level.

Reviewed on Mar 7, 2019

dr kosmorsky is great. explains what he sees going on with my eyes. mentions some possible "options" for the future. very candid and straight forward. as the dr who first diagnosed my MS I've considered him a very thoughtful guy.

Reviewed on Mar 1, 2019

I recently switched to Dr. K from another ophthalmologist and am very pleased. I feel Dr. K is being more proactive in my medical care than my former doctor.

Reviewed on Feb 26, 2019

Dr. was very patient and explained everything to me.

Reviewed on Feb 15, 2019

Dr Kosmorsky is excellent. He is thorough but efficient and explains everything in detail.

Reviewed on Feb 8, 2019

Doctor rushed in and out, he seemed upset that my condition returned but as if he had to deal with it not me

Reviewed on Feb 8, 2019

Dr. Kosmorski did not take time to talk to me about my condition, and he stated he is not sure why it has returned. He gave me no information on what to do if it gets worse, how to lessen symptoms, or what I should or shouldn't be doing at this time, i.e. consuming alcohol.

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