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Dr. Cathy Sun is an ophthalmologist who specializes in caring for adults with glaucoma. She performs a variety of laser procedures and surgeries, including minimally invasive glaucoma surgery, glaucoma filtering surgery and cataract surgery.

Sun's research focuses on using electronic health records and clinical trials to improve diagnosis and treatment of glaucoma and other chronic eye disorders. She has received research funding from the American Glaucoma Society and is currently supported by the National Institutes of Health.

Sun earned her medical degree and completed a residency in ophthalmology at UCSF. She completed a fellowship in glaucoma at Bascom Palmer Eye Institute. She received a merit award fellowship from the Heed Ophthalmic Foundation.

Sun is a member of the American Academy of Ophthalmology, Association for Research in Vision and Ophthalmology and American Glaucoma Society. In her free time, she enjoys running, gardening and exploring the outdoors.

  • Education

    UCSF, MD, 2014

  • Residencies

    UCSF, Ophthalmology, 2018

  • Fellowships

    Bascom Palmer Eye Institute, Glaucoma, 2019

  • Academic Title

    Assistant Professor

My goal is to help patients better understand their disease so we can work together to identify the best therapeutic solutions.

Where I see patients (1)

    My reviews


    Overall Experience
    171 Ratings
    About our process
    Nov 07, 2023
    I appreciate the explanations I received about my eyes. I always have my eyes checked every year so I was concerned about why I had not been told I had a problem. I accept the explanation I received. I currently live 50 miles away but I was determined to keep the appointment to check my eyes
    Oct 12, 2023
    Dr. Sun is nice and professional!
    Sep 21, 2023
    Most skillful conscientious and thoughtful ophthalmologist I've seen in years. Performed a delicate surgery successfully and explained in advance what she was doing to increase likelihood of success; over the last 2-1/2 years has followed up carefully and made sure I was able to get appointments when needed and adjusted meds as needed when I called on phone.
    Aug 29, 2023
    Generally UCSF's ophthalmology has been somewhat disappointing over the years but Dr. Sun has been a plus.
    Aug 02, 2023
    Again my visit with Dr. Sun was very good. She informed me of everything that she was doing and made recommendations that will be beneficial to my eye care. Very happy to have her as my doc.
    Jun 01, 2023
    Everything is great except the delay. We get it but we cannot rate that part of it as a terrific experience. Thanks for understanding.
    Apr 11, 2023
    Dr Sun is an excellent doctor with terrific communication skills. She is a great listener and cares a lot. I am so grateful to have her as my eye doctor
    Feb 17, 2023
    Dr. Sun is relatively new to me and thus far she has been a positive provider. I came to UC Ophthalmology several years ago and have had several change of doctors change not of my choice. I hope for a more stable environment.
    Feb 04, 2023
    Dr Sun has excellent skills in listening to the patient providing explanations of conditions and treatment options and offering options in a collaborative manner. She has good attention to detail while also providing a thoughtful and pragmatic general understanding of a situation-great judgement.
    Dec 22, 2022
    Dr Sun is an exceptionally good doctor
    Dec 20, 2022
    Dec 08, 2022
    Nice person and a good doctor
    Nov 16, 2022
    Dr. Sun has lived up to the expectations I was told I could have for care at UCSF Glaucoma clinic
    Nov 10, 2022
    Dr Sun has been very empathetic thoughtful and clear in answering questions and providing all information needed. She has been a pleasure to work with.
    Sep 29, 2022
    Dr. Sun is still relatively new to me. She seems to be knowledgeable and caring.
    Sep 11, 2022
    She was very good at listening to my questions and providing clear and thoughtful answers. Her explanation of the procedure was ver clear.
    Jul 28, 2022
    Dr. Sun and her staff are excellent healthcare providers.
    Jul 24, 2022
    The doctor was very engaging and warm and friendly and seemed concerned about my condition and provided a new what I think a new alternative treatment and wants to do more study and treatment on my rare case which is pleasing to hear
    Jul 19, 2022
    Especially appreciated her explanations about the new equipment at this new corneal care clinic building.
    Jul 14, 2022
    Dr Sun is thorough and thoughtful throughout the examination. Good job.
    Jul 12, 2022
    She did an excellent job in every way.
    Jul 12, 2022
    Dr Sun is a gem. This coming from a retired Hospital Administrator of 40 years.
    May 20, 2022
    Reminded me that I can send photos. Nice.
    Apr 28, 2022
    This was my second visit with Dr. Sun. The relationship is succeeding.
    Apr 26, 2022
    Dr Sun is a Gem. She's a "keeper
    Mar 08, 2022
    Dr. Sun was very knowledgeable friendly and professional. She explained everything in detail.
    Mar 02, 2022
    Dr Sun is an excellent provider. She responds immediately to MyChart inquiries and has exceptional communication skills to complement her Medical skills.