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Samuel Chi-Hung Yiu

Samuel Chi-Hung Yiu, MD, PhD

Cornea and External Diseases

Accepting New Patients
Online Booking

Highlights

Age Groups Seen

  • Young Adult 18-25
  • Adult 26-64
  • Older Adult 65+

Languages

  • Chinese - Cantonese
  • English

Gender

Male

Johns Hopkins Affiliations:

  • Johns Hopkins School of Medicine Faculty

About Samuel Chi-Hung Yiu

Primary Academic Title

Associate Professor of Ophthalmology

Johns Hopkins Physician

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Background

Samuel C. Yiu, M.D., Ph.D., is an associate professor of ophthalmology at the Wilmer Eye Institute, specializing in cornea and external eye diseases, cataracts and refractive surgery (LASIK). In addition, he is a nationally and internationally recognized specialist in ocular surface diseases and ocular surface reconstruction surgery.

Dr. Yiu received his M.Sc. (applied biometry) and Ph.D. (physiology and biophysics) from the University of Southern California. He then completed a post-doctoral fellowship in lacrimal physiology at the Schepens Eye Institute at Harvard Medical School and went on to earn his M.D. from the University of Alberta in Canada. Dr. Yiu completed an internship and his ophthalmology residency at Dalhousie University in Halifax, Nova Scotia and a fellowship in cornea, external disease and refractive surgery at the University of Southern California’s Doheny Eye Institute. After serving as the director of Doheny’s Ocular Surface Center and co-director of Doheny’s cornea division, Dr. Yiu joined the Wilmer faculty in 2011 and spent two years as the chief of the cornea division at King Khaled Eye Specialist Hospital (KKESH), Wilmer’s affiliate hospital in Riyadh, Saudi Arabia, before returning to Baltimore in 2013.

Centers and Institutes

Wilmer Eye Institute Research

Research Interests

Basic Research, Dry Eye, Lacrimal Gland Physiology, Nanodrug delivery

Locations

  1. Johns Hopkins Bayview Medical Center
    • 4940 Eastern Avenue, Bayview Medical Offices, Level 01 (G), Clinic 3, Baltimore, MD 21224
    • Get Directions
  2. The Johns Hopkins Hospital
    • 1800 Orleans Street, Maumenee Lobby, Baltimore, MD 21287
    • Get Directions

Expertise

Education

  • Fellowship: Keck School of Medicine of USC, Cornea, External Diseases & Refractive Surgery, 2001
  • Residency: Dalhousie University Faculty of Medicine, Ophthalmology, 1999
  • Medical Education: University of Alberta Faculty of Medicine, MD, 1994
  • Graduate School: University of Southern California, PhD, 1988

Board Certifications

  • Ophthalmology: American Board of Ophthalmology, 2004

Insurance

Please contact the location directly to confirm your health plan is accepted.
Search plans
  • Aetna
  • CareFirst
  • Cigna
  • First Health
  • Geisinger Health Plan
  • HealthSmart/Accel
  • Johns Hopkins Health Plans
  • MultiPlan
  • Pennsylvania's Preferred Health Networks (PPHN)
  • Point Comfort Underwriters
  • Private Healthcare Systems (PHCS)
  • Veteran Affairs Community Care Network (Optum-VACCN)

Ratings & Reviews

4.8 out of 5

295 ratings, 129 reviews

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

Overall Rating by Patient
Provider Listened Carefully
Provider Explained Things Clearly
Provider Knew Medical History
Provider Showed Respect
Provider Spent Enough Time
Search reviews
    5 out of 5 stars
    Reviewed on 3/20/2026

    Even with the bad news the doctor made me feel it was going to be ok

    5 out of 5 stars
    Reviewed on 3/20/2026

    Dr Yiu was very interested in helping me.

    4 out of 5 stars
    Reviewed on 3/18/2026

    I think Dr Yiu is an excellent Ophthamologist who knows his subject and relates info well. He shows enthusiasm for his field of study.

    5 out of 5 stars
    Reviewed on 3/17/2026

    First time visit. Provider took plenty of time to get to understand my situation and provide information about a path forward.

    4 out of 5 stars
    Reviewed on 3/13/2026

    After having my eyes tested, I had to wait ~1 hr to see Dr. Yiu. If the city had been out ticketing cars, I would have gotten one.

    5 out of 5 stars
    Reviewed on 3/13/2026

    He is a very nice caring man. He remembers other health issues I'm dealing with. When praying he includes them and a safe journey home.

    5 out of 5 stars
    Reviewed on 3/13/2026

    Provider is excellent! Highly recommended.

    5 out of 5 stars
    Reviewed on 3/13/2026

    FriendlyPatient Interested Explained well

    5 out of 5 stars
    Reviewed on 3/12/2026

    Makes you feel very special.

    5 out of 5 stars
    Reviewed on 3/10/2026

    Excellent!

    5 out of 5 stars
    Reviewed on 3/10/2026

    He made me feel cared for and I felt very comfortable with him ! He's awesome

    5 out of 5 stars
    Reviewed on 3/10/2026

    Good

    5 out of 5 stars
    Reviewed on 3/10/2026

    Very Knowledgeable

    5 out of 5 stars
    Reviewed on 3/3/2026

    Was good

    5 out of 5 stars
    Reviewed on 2/27/2026

    Dr. Yiu is the physician who actually cares about his patients' overall well-being.

    4 out of 5 stars
    Reviewed on 2/27/2026

    Dr Yiu was very thorough and didn't sugar-coat the seriousness or possible result of the surgery I was there to discuss. He was very caring.

    5 out of 5 stars
    Reviewed on 2/26/2026

    Dr. Yiu is the best!

    5 out of 5 stars
    Reviewed on 2/26/2026

    As he recently retired nurse practitioner of 47 years I feel like I am in a good position to evaluate a healthcare provider in terms of their knowledge, skills, compassion, and bedside manner. Dr. Samuel Yiu is one of the finest physicians I've had the pleasure of seeing.

    5 out of 5 stars
    Reviewed on 2/24/2026

    Very nice

    5 out of 5 stars
    Reviewed on 2/20/2026

    Dr. Yiu is a very caring and empathetic person, needless to say that he is an excellent professional who also keeps me informed of any new research or treatments for dry eyes.

    5 out of 5 stars
    Reviewed on 2/19/2026

    He has been very pleasant and I love the fact that he believes in God

    5 out of 5 stars
    Reviewed on 2/17/2026

    Its always a great experience.

    5 out of 5 stars
    Reviewed on 2/13/2026

    Love my new doctor! He treated me with kindness and compassion.

    5 out of 5 stars
    Reviewed on 2/12/2026

    Very knowledgeable and friendly

    5 out of 5 stars
    Reviewed on 2/10/2026

    So impressed with the way Neurosurgeon and ophthalmologist coordinated my care

    5 out of 5 stars
    Reviewed on 2/10/2026

    I have confidence in this provider.

    5 out of 5 stars
    Reviewed on 2/5/2026

    Dr. Yiu is an accomplished doctor and a fine man. I feel I'm in excellent hands with him.

    5 out of 5 stars
    Reviewed on 2/3/2026

    Dr. Yiu is a excellent doctor he's always concerned about the welfare of his patients. And does his best to tend to our care the best he can.

    5 out of 5 stars
    Reviewed on 2/3/2026

    He is the best Dr ever he cares about your health

    5 out of 5 stars
    Reviewed on 1/29/2026

    Dr. Yiu is an excellent doctor who is compassionate and caring. He always listens to me and addresses all of my concerns. I traveled far to see him because I trust him and know I will receive excellent care.

    5 out of 5 stars
    Reviewed on 1/23/2026

    Dr. Yiu couldn't have been more patient and thoughtful during this consultation for a second opinion. His recommendation of a follow up provider close to home was very helpful.

    5 out of 5 stars
    Reviewed on 1/22/2026

    This was my first visit with Dr. Yiu and I found him to be very nice and extremely knowledgeable and caring.

    5 out of 5 stars
    Reviewed on 1/22/2026

    He is always professional and respectful. Good listener and very personable

    5 out of 5 stars
    Reviewed on 1/20/2026

    It has been a safe and greatly appreciated experience as a patient.

    5 out of 5 stars
    Reviewed on 1/20/2026

    Highly recommended

    5 out of 5 stars
    Reviewed on 1/16/2026

    He was a very kind doctor and prayed with me after his examination. He was also attentive to my situation which could have been quite serious as I needed to see an ophthalmologist right away due to shingles in my left eye. I could have gone blind in that eye and Dr Yiu made room in his schedule for me to make certain my eye was treated.

    5 out of 5 stars
    Reviewed on 1/15/2026

    Calm and patient, listened attentively, answered fully in ways that were easy to understand.

    5 out of 5 stars
    Reviewed on 1/15/2026

    Dr Yiu has been a very professional and responsive provider. I truly trust him in his ability to provide the best care for me.

    5 out of 5 stars
    Reviewed on 1/13/2026

    Very knowledgeable and caring

    5 out of 5 stars
    Reviewed on 1/13/2026

    Very good as a professional and as a human being

    5 out of 5 stars
    Reviewed on 1/6/2026

    Very through, explained my options

    5 out of 5 stars
    Reviewed on 1/6/2026

    Dr. Yiu is a great Doctor, takes his time, and keeps his patient well inform.

    5 out of 5 stars
    Reviewed on 1/6/2026

    Very courteous, warm and concerned for my overall well-being. I wish we had more doctors with that bedside manner

    5 out of 5 stars
    Reviewed on 12/19/2025

    Very caring, nice and professional!

    5 out of 5 stars
    Reviewed on 12/16/2025

    Dr. Yiu Is highly intelligent, well respected, and an excellent healthcare provider. I am a recently retired nurse practitioner with a PhD and 45 years experience. I feel I am a good judge of both medical competency and a persons integrity. I'm highly impressed with Dr. Yiu

    5 out of 5 stars
    Reviewed on 12/16/2025

    Good Dr.

    5 out of 5 stars
    Reviewed on 12/16/2025

    I was thankful that the Doctor prayed with me at the conclusion of the visit.

    5 out of 5 stars
    Reviewed on 12/12/2025

    Very happy

    5 out of 5 stars
    Reviewed on 12/11/2025

    Everyone was very proficient and professional

    5 out of 5 stars
    Reviewed on 12/11/2025

    He is great

    5 out of 5 stars
    Reviewed on 12/9/2025

    He was very knowledgeable

    5 out of 5 stars
    Reviewed on 12/5/2025

    I received Excellent care and service Thank you V

    5 out of 5 stars
    Reviewed on 12/2/2025

    First class. Kind caring detailed

    5 out of 5 stars
    Reviewed on 12/2/2025

    Very attentive, respectful and caring

    5 out of 5 stars
    Reviewed on 11/25/2025

    He is amazing, listens to your concerns and is very caring

    5 out of 5 stars
    Reviewed on 11/21/2025

    Very personable and related to me. He provided me with information I needed in easy to understand detail. I never felt rushed and he spoke face to face with me, not looking at his computer continuously

    5 out of 5 stars
    Reviewed on 11/21/2025

    Doctor Yiu was outstanding in every area of my concern.

    5 out of 5 stars
    Reviewed on 11/21/2025

    Very thorough. Explains in detail.

    5 out of 5 stars
    Reviewed on 11/21/2025

    DR is the Best!!

    5 out of 5 stars
    Reviewed on 11/21/2025

    This provider is very good and professional and cares about his patients!

    5 out of 5 stars
    Reviewed on 11/21/2025

    He did a great job asking questions along with exam and information from previous doctors. Will see him again on 3 weeks

    5 out of 5 stars
    Reviewed on 11/19/2025

    Shows concern Friendly Thorough

    5 out of 5 stars
    Reviewed on 11/18/2025

    Excellent!

    5 out of 5 stars
    Reviewed on 11/14/2025

    Professional and respectful

    5 out of 5 stars
    Reviewed on 11/13/2025

    Treatment was good and did a great job with me

    5 out of 5 stars
    Reviewed on 10/28/2025

    Appreciated the prayer

    5 out of 5 stars
    Reviewed on 10/24/2025

    I saw Dr. Yiu for a second opinion. I had no medical records to give him, but he listened closely as I described my symptoms and was able to confirm my original diagnosis.

    5 out of 5 stars
    Reviewed on 10/24/2025

    Dr. Yiu was extremely patient and empathetic. He listened and offered a solution. [staff], the technician, was amazingvery helpful.

    5 out of 5 stars
    Reviewed on 10/23/2025

    Very kind, patient, respectable and knowledgeable

    5 out of 5 stars
    Reviewed on 10/23/2025

    Dr. Yiu is truly an outstanding physician. I travels from Florida in order to see Dr. Yiu for cataract surgery. I trust his treatment and operating skills above all others in his field.

    5 out of 5 stars
    Reviewed on 10/10/2025

    My eyes have improved greatly since seeing and following Dr. Yiu's directions.

    5 out of 5 stars
    Reviewed on 10/7/2025

    It's obvious Dr Yiu is an expert in his field. He has definite concerns about the conditions a patient presents with and expresses his concerns in a positive manner. He is totally trustworthy.

    5 out of 5 stars
    Reviewed on 10/6/2025

    Dr.Yiu was very knowledgeable and caring. I would give him a rating above 10 if I could.

    5 out of 5 stars
    Reviewed on 10/3/2025

    It took a moment for Dr. Yiu and I to see eye to eye, but that was quickly cleared up. Dr. Yiu was professional and friendly. He is also extremely knowledgeable.

    5 out of 5 stars
    Reviewed on 10/3/2025

    Dr Yiu is a very compassionate and caring doctor. I highly recommend him.

    4 out of 5 stars
    Reviewed on 9/30/2025

    Hes ok. He took care of my eye, at my eye surgery.

    5 out of 5 stars
    Reviewed on 9/30/2025

    Excellent Customer Focus Experience

    5 out of 5 stars
    Reviewed on 9/25/2025

    Takes the time and is very thorough.

    5 out of 5 stars
    Reviewed on 9/25/2025

    Very professional, kind, and gentle.

    5 out of 5 stars
    Reviewed on 9/25/2025

    The doctor is a very kind & considerate & very knowledgeable .

    5 out of 5 stars
    Reviewed on 9/25/2025

    Dr Yiu is not only a good physician but very caring.

    5 out of 5 stars
    Reviewed on 9/23/2025

    All good

    5 out of 5 stars
    Reviewed on 9/23/2025

    Excellent, caring provider

    5 out of 5 stars
    Reviewed on 9/23/2025

    Excellent help and advice re vision and correction of vision.

    5 out of 5 stars
    Reviewed on 9/9/2025

    Dr. Yiu is wonderful opthamologist who is very thorough with my eye exams & treatments since I only have vision in one eye.

    5 out of 5 stars
    Reviewed on 9/9/2025

    He went out of his way to attend to my illness in a timely manner.

    5 out of 5 stars
    Reviewed on 9/9/2025

    The best

    5 out of 5 stars
    Reviewed on 9/2/2025

    I am with dr yiu for many years and am satisfied with my care and eyesight. I am a diabetic and visited him for a preventative check up

    5 out of 5 stars
    Reviewed on 9/2/2025

    Dr Yiu Was very knowledgeable and professional in reviewing and discussion my current medical condition. As he was examining an eye That had previously been operated on by a fellow doctor, [staff], He said he did not want to make a decision on how to proceed with my current eye condition. He referred me back to [staff]. Therefore, what accomplished were eye examinations and tests; No treatment of the eye condition.

    5 out of 5 stars
    Reviewed on 8/29/2025

    Professional and caring about patients health

    5 out of 5 stars
    Reviewed on 8/29/2025

    Wore an mask. Excellent!

    5 out of 5 stars
    Reviewed on 8/26/2025

    Dr. Yiu is terrific. He gives me comfort that my eyes are healthy now. I trust him and feel blessed to have him perform my cataract surgery and follow on care.

    5 out of 5 stars
    Reviewed on 8/26/2025

    Very professional. Listened carefully to family visual history.

    5 out of 5 stars
    Reviewed on 8/19/2025

    Dr. Yiu is one of the best physicians that I've had the chance to meet. He is very attentive and listens to whatever is on your mind about the procedures that he may have lined up.

    4 out of 5 stars
    Reviewed on 8/19/2025

    All thing was excellent

    5 out of 5 stars
    Reviewed on 8/15/2025

    Dr. Yiu was very helpful and compassionate. He tried to do all he could to meet my needs.

    5 out of 5 stars
    Reviewed on 8/14/2025

    Dr Yiu is a marvelous Doctor We are so grateful for his care

    5 out of 5 stars
    Reviewed on 8/12/2025

    VERY BEST COMMUNICATOR, GENUINE

    5 out of 5 stars
    Reviewed on 8/7/2025

    Very nice and knowledgeable. Dr Yiu is not just a great doctor but one of the most caring and compassionate human beings I see at Hopkins

    5 out of 5 stars
    Reviewed on 8/5/2025

    Dr Yiu is a patient doctor who takes time to listen to Theron's concerns and follows him closing concerning his eye condition.

    5 out of 5 stars
    Reviewed on 7/25/2025

    Dr. Yiu made sure he fully understood the previous surgeries I have had on my eye and weighed the options for me going forward. I came for a second opinion and am so glad I did.

    5 out of 5 stars
    Reviewed on 7/25/2025

    The provider gave me clear information about my condition. The answers to that which was concerning my health was addressed.

    5 out of 5 stars
    Reviewed on 7/24/2025

    he was a very thorough exam, and the overall experience was extraordinarily professional

    5 out of 5 stars
    Reviewed on 7/24/2025

    I've been seeing Dr. Yiu for 8 years and I am very comfortable with his care for my eyes. He is compassionate and caring.

    5 out of 5 stars
    Reviewed on 7/24/2025

    Dr. Yiu is an excellent doctor and fine man. I look forward to my visits.

    5 out of 5 stars
    Reviewed on 7/22/2025

    Dr Yiu is a highly skilled surgeon who did a fantastic job with my cataract surgery. He is also a compassionate and empathetic person, who listened to the patient.

    5 out of 5 stars
    Reviewed on 7/22/2025

    Excellent

    5 out of 5 stars
    Reviewed on 7/15/2025

    Wonderful -attentive-thorough!!

    5 out of 5 stars
    Reviewed on 7/11/2025

    He is execlent to help my needs

    5 out of 5 stars
    Reviewed on 7/1/2025

    The eye photographer technician was excellent, ultra professional yet very warm and caring. Dr Yiu was very empathetic, very detailed in his analysis while explaining everything to me with non technical vocabulary so that I was able to comprehend the information.

    5 out of 5 stars
    Reviewed on 7/1/2025

    Provider was great. Have been unable to schedule a required follow-up

    5 out of 5 stars
    Reviewed on 7/1/2025

    Very nice very helpful and very information

    4 out of 5 stars
    Reviewed on 7/1/2025

    My concern for the visit was fully satisfied. The doctor was careful to listen and kind. I appreciate it that he prayed with me at the end of our visit.

    5 out of 5 stars
    Reviewed on 6/20/2025

    The doctor took his time to explain my situation and was very professional.

    5 out of 5 stars
    Reviewed on 6/19/2025

    He is awesome and gives full attention when with me.

    5 out of 5 stars
    Reviewed on 6/17/2025

    Dr Yiu is very personable and a very caring health provider.

    5 out of 5 stars
    Reviewed on 6/5/2025

    Dr. Yiu was amazing. Very professional, yet friendly, he explained everything with patience and empathy.

    5 out of 5 stars
    Reviewed on 6/3/2025

    Very good service

    5 out of 5 stars
    Reviewed on 5/30/2025

    I'm willing to travel the 90 minutes it took me to get there to see Dr. Yiu. He listened to me and provided answers.

    5 out of 5 stars
    Reviewed on 5/20/2025

    Dr Yiu, is very professional and pleasant. He takes his time to explain and also says a prayer after the appointment.

    5 out of 5 stars
    Reviewed on 5/13/2025

    Dr. Yiu is a caring and extremely knowledgeable provider, which is a rarity these days. He took the tome to explain things clearly to me. He is the best Ophthalmologist I've ever met.

    5 out of 5 stars
    Reviewed on 5/9/2025

    Thorough, attentive, and concerned.

    5 out of 5 stars
    Reviewed on 5/8/2025

    DR SAM YIU ISA INCREDIBLE PHYSICIAN, A HUMANITARIAN AND THOROUGH PHYSICIAN.HE IS SUCH A GREAT ASSET TO WILMER EYE CLINIC

    5 out of 5 stars
    Reviewed on 5/6/2025

    Very nice and concerning

    5 out of 5 stars
    Reviewed on 5/2/2025

    A caring, friendly man who has excellent patience and is a very concerned person.

    5 out of 5 stars
    Reviewed on 5/1/2025

    Dr Yiu is at the top of his craft. I have total confidence in him.

    4 out of 5 stars
    Reviewed on 4/22/2025

    He's good. But requiring follow ups that JHMI can't schedule in a timelly manner

    5 out of 5 stars
    Reviewed on 4/17/2025

    He is very polite and very caring.

    3 out of 5 stars
    Reviewed on 4/15/2025

    It was late in the in the day befor I was seen zAfter I did all the tests I was seen by Dr Yiu He said I need to get glasses This is where my story story began. 1 Eye Dr 2 OpthomoPilogist and Yiu. Where now