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


  • Psychiatry and Neurology - 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 11/2/2020, 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

410 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
4.5 out of 5
Explains 4.5
Courtesy, Respect & Concern 4.6
Patient Rating of Doctor 4.5

52 Patient Comments

Reviewed on Nov 3, 2020

felt very confident in Dr Kosmorsky's analysis and medical knowledge

Reviewed on Oct 27, 2020

Excellent treatment by Dr. Kosmorsky and answered all my questions and discussion regarding surgery.

Reviewed on Oct 27, 2020

He is a very good and professional doctor great asset for cleveland clinic

Reviewed on Oct 12, 2020

I love my eye doctor and cleveland clinic

Reviewed on Oct 1, 2020

Dr Kosmorsky is very knowledgeable, explained my condition thoroughly, and referred me to a retinal specialist regarding my potential condition.

Reviewed on Sep 25, 2020

Always a good experience with Dr Kosmorsky!

Reviewed on Sep 22, 2020

I have been seeing Dr Kosmorsky for many years, I trust his judgement. He is also a nice person!

Reviewed on Sep 15, 2020

Dr kosmorsky is airways so pleasant and personable.

Reviewed on Sep 15, 2020

Dr k is so personable.

Reviewed on Sep 10, 2020

Dr was very courteous and professional.

Reviewed on Aug 27, 2020

I am not a good patient when it comes to my eyes.I this was the best eye appt I have ever had. Dr was fantastic.

Reviewed on Aug 27, 2020

I have recommended Dr. Kosmorski to others.

Reviewed on Aug 20, 2020

Dr. kosmorsky is great

Reviewed on Aug 20, 2020

Dr. Kosmorsky is easy to work with.

Reviewed on Aug 18, 2020

what a great physician!

Reviewed on Aug 18, 2020

The Clinic is fortunate to have Dr. K

Reviewed on Jul 30, 2020

I felt Dr. Kosmorsky went above and beyond for me on the day of my last appointment. It was a fairly urgent issue, and we live 3 hours away, so he arranged for more tests and visits with another doctor to be done the same day.

Reviewed on Jul 21, 2020

Dr. Kosmorsky was very pleasant and personable. He explained the results to my test and was knowledgeable.

Reviewed on Jul 20, 2020

I could not have a better Dr.,would highly recommend Dr.Kosmorsky and the Cole Eye Institute....Hope he never retires!!!!!

Reviewed on Jul 14, 2020

Dr.Kosmorsky's group was absolutely on point with CDC Guidelines for COVID. I was taken into a procedure room as soon as I arrived. I did not have to wait very long before the doctor stepped in and he squired the medication for my procedure. In very short order the procedure was done and I checked and made my return appointment. This is indicative of all of my of all of my medical connections since my initial appointment.

Reviewed on Jun 29, 2020

I saw the doctor for 4-5 minutes. Felt very rushed by doctor and nurse. OCT technician was great though.

Reviewed on Jun 25, 2020

After waiting a few months for the appointment the doctor was with me all of 5 minutes.

Reviewed on Jun 25, 2020

Doctor was dismissive of three seperate concerns I had about my eyes. He also never spends enough time with me at my appointments.

Reviewed on Jun 22, 2020

dr.kosmorsky was great.

Reviewed on Jun 22, 2020

Always enjoy and appreciate the level of care and attention by this doctor and others at the time of service.

Reviewed on Jun 15, 2020

Dr K is wonderful. although the appointments always take a very long time. this one was nearly 2 hours. lots of waiting even though there were not many patients.

Reviewed on May 19, 2020

Dr. was excellent in explaining testing, results and recommended procedure options.

Reviewed on May 18, 2020

don't know what i would have done if i wouldn't been doctor k he the only one that new what was going on with my eyes and i thank him so much

Reviewed on May 14, 2020

Dr Kosmorsky is a phenomenal opthomologist. Cc is lucky to have him. He's an asset to the clinics program. Excellent experience.

Reviewed on May 8, 2020

Dr Kosmorsky made me feel like I was his only patient

Reviewed on Apr 14, 2020

The exceptional care, humanism, professionalism demonstrated and received has made me a patient for life! I had a headache for 21 days and nothing worked. The treatment I received from Dr. Kosmorsky relieved my headache in 20 minutes.

Reviewed on Mar 31, 2020

very polite doctor, and staff.

Reviewed on Mar 31, 2020

This doctor is a straight shooter. He is not a warm fuzzy kind of guy but he is very good. I like him but I am not sure he is everyones cup of tea.

Reviewed on Mar 17, 2020

Dr. Kosmorsky and his nurse were very nice and professional.

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.

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