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 School - 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 8/9/2018, 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

418 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
4.7 out of 5
Explains 4.7
Listens 4.7
Courtesy, Respect & Concern 4.8
Knows Medical History 4.6
Time Spent with Patient 4.5
Patient Rating of Doctor 4.7

31 Patient Comments

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.

Reviewed on Jan 8, 2019

Dr Kosmorsky explains everything associated with my glaucoma very well

Reviewed on Jan 4, 2019

Check-in was convenient. Dr. Kosmorsky and his assistant were on time, pleasant, and very professional.

Reviewed on Jan 3, 2019

Dr. Kosmorsky is an efficient, friendly and excellent doctor.

Reviewed on Dec 13, 2018

Could not provide name of multifocal ERG tester at Nationwide Childrens Hospital in Columbus; I need that doctor's name in order to make an appointment to have that procedure done.

Reviewed on Dec 7, 2018

Dr Kosmorsky is a great physician and good bedside manner

Reviewed on Nov 15, 2018

Dr. Gregory S Kosmorsky, DO, has been the only true long-term physician that I have been under the care of with the Cleveland Clinic. As a young Dr. around 1989 he has overseen my vision and subsequent issues from 1989 to present day. My primary care oversight has shifted over the years like the wind. Thank you for doctors like Dr. "Koz" who develop a long-term relationship in not only caring for, but understanding and balancing the patients wants and needs.

Reviewed on Nov 8, 2018

No problem and I would like to come back when I need a appointment to see Doctor

Reviewed on Oct 2, 2018

I am very pleased with this doctor and all of my doctors and nurses

Reviewed on Oct 2, 2018

I wish the doctor would have introduced himself to me and offered a handshake since I had never met him before. just a suggestion to be more personal.

Reviewed on Sep 27, 2018

Dr. was abrupt, dismissive and not willing to talk about referral or complicated medical history as it may relate to current symptoms. Husband and I will never return and will caution friends to not see him ever. Office staff was good though and we were pleased to get in relatively quickly from the time the retinal specialist referred me.

Reviewed on Sep 24, 2018

Dr Kosmorsky is always thorough with explaining what was done, what the results were and what actions would be needed going forward. He always reminds me to alert the proper caregiver if new or worsening signs/symptoms occur. There is always a follow up call with results from other diagnostics.

Reviewed on Jul 12, 2018

I was in the exam room for at least an hour waiting for my annual diabetes eye exam. I was at my appointment start to finish about 2 hours and saw my doctor for only about 10 minutes. I understand this is not uncommon because I see alot of doctors at the clinic with myself and family. I mention it because you asked and I really wish two hours could be shortened.

Reviewed on Jun 29, 2018

Dr. Kosmorsky is a wonderful Doctor who truly listens to his patients concerns. His answers were easy to understand and he was very helpful to me.

Reviewed on Jun 26, 2018

Provider is very hurried. Spends as little time as possible. Does not ask if I have questions. I feel like I am one of the cattle being herded along in and out as fast as possible. I do believe he is an exceptionally competent surgeon however, I have never felt more like cattle being rushed through as I did for my eye surgeries. He is very proud of how fast he can complete an eye surgery and how many people (cattle) he can get done in a morning but there is no feeling of being an individual who is being cared for.

Reviewed on May 22, 2018

I had to wait to see my provider only because I needed time for my eyes to dilate before he could examine me

Reviewed on May 18, 2018

I am happy with this provider. I get appointments when I need them.never a long term wait like month's. He takes care of my eye issued.

Reviewed on May 15, 2018

It was a 20 minute eye exam. 15 minutes to dilate my eyes 5 minutes for the exam with the doctor.

Reviewed on May 15, 2018

in and out in no time. 5 minutes with a tech. 15 minutes wating for my eyes to dilate. 5 minutes with the doctor and see you in one yr. and one day. My kind of doctor visit.

Reviewed on May 8, 2018

All of Dr. Kosmorsky's staff were professional and efficient. From start to finish, my visit was like clockwork and very appreciated. Dr. Kosmorsky is one top-notch doctor. He listens!

Reviewed on May 1, 2018

doctor seemed rushed, was explaining things and before I knew it he was gone.

Reviewed on Apr 16, 2018

I was there for 3 hours before I saw the actual doctor, wait time for the visual field test was to long

Reviewed on Apr 6, 2018

Doctor gave no advice about how to deal with troubling side effects of the eye drops. Doctor gave an evaluation of 20/20 vision and said he could do nothing for me even though the letters I read for the evaluation were blurry to me.

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