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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

481 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 4.4
Courtesy, Respect & Concern 4.5
Patient Rating of Doctor 4.4

53 Patient Comments

Reviewed on May 20, 2021

The Dr. was caring and checked my medical notes from other providers. He made a suggestion as to new MRI needed with the T3 MRI machine which will help in diagnosing my problem.

Reviewed on May 18, 2021

love Dr kosmorsky..good man

Reviewed on Apr 29, 2021

Dr. Kosmosky is quick, thorough and has a good sense of humor. I have to see him yearly and he has always made it a pleasant experience.

Reviewed on Apr 29, 2021

I wanted to nominate Dr kosmorsky for Sainthood because what he does to me is miraculous, he help Ed me see much better and he's a great professional

Reviewed on Apr 29, 2021

excellent Doctor and staff

Reviewed on Apr 26, 2021

Dr didn't help me at all other than not his expertise field on to next Dr...

Reviewed on Apr 26, 2021

The doctor was entirely to short and blunt with the exam. He looked in my eyes the said a MRI is needed, you probably have a brain tumor, benign, or an aneurysm. No further appointment necessary, I will call you. It is now Wed. at 4:45pm and he has not called yet, MRI was done at 2:30 on Monday. Dr K was just not very kind in saying the possibilities of a problem.

Reviewed on Apr 5, 2021

A top-notch doctor that took time to explain my condition and answer my questions.

Reviewed on Mar 11, 2021

dr kosmorsky is very attentive to his patients medical problems.

Reviewed on Feb 12, 2021

I really felt comfortable with my provider and staff. I will be seeing him again in the future

Reviewed on Jan 12, 2021

Dr.Kozmorsky is the best . He takes time out to talk to u about everything . Will always recommend him.

Reviewed on Jan 8, 2021

It was a good experience meeting with Dr. Kosmorsky for the first time. He LISTENED to me and answered any questions.

Reviewed on Dec 31, 2020

Dr. K is always very professional and great to work with. His technician who worked with me was absolutely fantastic. (sorry, name escapes me)

Reviewed on Dec 31, 2020

Dr. Kosmorsky is my ophthalmologist because he is the best.

Reviewed on Dec 31, 2020

Excellent doctor. Explains matters succinctly and answers questions clearly.

Reviewed on Dec 31, 2020

Dr. Kosmorsky has been my doctor for 25 years. I just hope he never retires.

Reviewed on Dec 31, 2020

I am so hard to impress, and I spent a lot of time presenting questions and concerns on a technical level to the Doctor . . . Dr. Kosmorsky was not just patient and informative, it was very revealing as to the level of expertise and "bedside" manner that he brings to the table . . . I will definitely keep his name in my file and return for his care! You had better work to ensure that Dr. Kosmorsky stays on your roster!!!

Reviewed on Dec 31, 2020

As I have said over and over again, I was very impressed with all concerned in my visit on December 31, 2020, especially with Dr. Kosmorsky!

Reviewed on Dec 31, 2020

Dr. Kosmorsky is very good both as a Dr but also as a person. Joked around during our visit. I would recommend to anyone

Reviewed on Dec 28, 2020

I have recommended Dr Kosmorsky to others before

Reviewed on Dec 15, 2020

dr mcGannons scheduler was kind n helpful getting my appointment, she knew I didn't want main campus, comfortable at Strongsville

Reviewed on Dec 15, 2020

I have seen Dr. Kosmorsky for years and appreciate his expertise, that he engages with my questions and provides understandable explanations

Reviewed on Dec 10, 2020

I am pretty sure this doctor is a very texperienced knowledgeable physician however he didn't talk to me like I was a person he was just all about business. he did not ask if I had any questions. I would like to have more of an explanation I felt like it was just get in get out and move on I have no idea at this point where do I go from here with thenext steps. and the bad thing is I have double vision and one of the things could be a brain tumor although it is not from my own review of my chart. it was not very comforting going in the office and the doctor not giving much information or compassion I feel bad for a lonely elderly person going in there. I love Cleveland clinic but in this case it was not first class service.

Reviewed on Dec 8, 2020

I had a very good experience during my appointment. Dr Kosmorsky is a very good doctor that is compassionate and personable. I feel lucky to have him as my doctor.

Reviewed on Dec 3, 2020

Dr Kozmorsky Is Awesome and One of Thee Best Drs You Have!God Bless

Reviewed on Nov 24, 2020

Dr. Kosmorsky is professional, thorough & knowledgeable! He also has a great sense of humor!

Reviewed on Nov 19, 2020

Dr. Koz is only about 5 years older than me and has treated me with great care since my late twenties. I'm 62 now and blessed to have him continuously for this lengthy period. He is the only Cleveland Clinic Dr. whose care has spanned most of my adult life.

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.

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