
Samuel Chi-Hung Yiu, MD, PhD
Cornea and External Diseases
Highlights
Age Groups Seen
- Young Adult 18-25
- Adult 26-64
- Older Adult 65+
Languages
- Chinese - Cantonese
- English
In-Network Plans
View All Accepted Plans (12)Gender
MaleJohns Hopkins Affiliations:
- Johns Hopkins School of Medicine Faculty
About Samuel Chi-Hung Yiu
Primary Academic Title
Associate Professor of Ophthalmology
Johns Hopkins Physician
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
Research Interests
Basic Research, Dry Eye, Lacrimal Gland Physiology, Nanodrug delivery
PubMed - Publications
Locations
- Johns Hopkins Bayview Medical Center
- 4940 Eastern Avenue, Bayview Medical Offices, Level 01 (G), Clinic 3, Baltimore, MD 21224
- Get Directions
- phone: 410-955-5080
- fax: 410-550-2231
- The Johns Hopkins Hospital
- 1800 Orleans Street, Maumenee Lobby, Baltimore, MD 21287
- Get Directions
- phone: 410-955-5080
- fax: 410-955-0468
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
- 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 reviewsThe 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.
- 5 out of 5 starsReviewed on 3/20/2026
Even with the bad news the doctor made me feel it was going to be ok
- 5 out of 5 starsReviewed on 3/20/2026
Dr Yiu was very interested in helping me.
- 4 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed on 3/13/2026
Provider is excellent! Highly recommended.
- 5 out of 5 starsReviewed on 3/13/2026
FriendlyPatient Interested Explained well
- 5 out of 5 starsReviewed on 3/12/2026
Makes you feel very special.
- 5 out of 5 starsReviewed on 3/10/2026
Excellent!
- 5 out of 5 starsReviewed on 3/10/2026
He made me feel cared for and I felt very comfortable with him ! He's awesome
- 5 out of 5 starsReviewed on 3/10/2026
Good
- 5 out of 5 starsReviewed on 3/10/2026
Very Knowledgeable
- 5 out of 5 starsReviewed on 3/3/2026
Was good
- 5 out of 5 starsReviewed on 2/27/2026
Dr. Yiu is the physician who actually cares about his patients' overall well-being.
- 4 out of 5 starsReviewed 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 starsReviewed on 2/26/2026
Dr. Yiu is the best!
- 5 out of 5 starsReviewed 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 starsReviewed on 2/24/2026
Very nice
- 5 out of 5 starsReviewed 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 starsReviewed on 2/19/2026
He has been very pleasant and I love the fact that he believes in God
- 5 out of 5 starsReviewed on 2/17/2026
Its always a great experience.
- 5 out of 5 starsReviewed on 2/13/2026
Love my new doctor! He treated me with kindness and compassion.
- 5 out of 5 starsReviewed on 2/12/2026
Very knowledgeable and friendly
- 5 out of 5 starsReviewed on 2/10/2026
So impressed with the way Neurosurgeon and ophthalmologist coordinated my care
- 5 out of 5 starsReviewed on 2/10/2026
I have confidence in this provider.
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed on 2/3/2026
He is the best Dr ever he cares about your health
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed on 1/22/2026
He is always professional and respectful. Good listener and very personable
- 5 out of 5 starsReviewed on 1/20/2026
It has been a safe and greatly appreciated experience as a patient.
- 5 out of 5 starsReviewed on 1/20/2026
Highly recommended
- 5 out of 5 starsReviewed 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 starsReviewed on 1/15/2026
Calm and patient, listened attentively, answered fully in ways that were easy to understand.
- 5 out of 5 starsReviewed 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 starsReviewed on 1/13/2026
Very knowledgeable and caring
- 5 out of 5 starsReviewed on 1/13/2026
Very good as a professional and as a human being
- 5 out of 5 starsReviewed on 1/6/2026
Very through, explained my options
- 5 out of 5 starsReviewed on 1/6/2026
Dr. Yiu is a great Doctor, takes his time, and keeps his patient well inform.
- 5 out of 5 starsReviewed 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 starsReviewed on 12/19/2025
Very caring, nice and professional!
- 5 out of 5 starsReviewed 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 starsReviewed on 12/16/2025
Good Dr.
- 5 out of 5 starsReviewed on 12/16/2025
I was thankful that the Doctor prayed with me at the conclusion of the visit.
- 5 out of 5 starsReviewed on 12/12/2025
Very happy
- 5 out of 5 starsReviewed on 12/11/2025
Everyone was very proficient and professional
- 5 out of 5 starsReviewed on 12/11/2025
He is great
- 5 out of 5 starsReviewed on 12/9/2025
He was very knowledgeable
- 5 out of 5 starsReviewed on 12/5/2025
I received Excellent care and service Thank you V
- 5 out of 5 starsReviewed on 12/2/2025
First class. Kind caring detailed
- 5 out of 5 starsReviewed on 12/2/2025
Very attentive, respectful and caring
- 5 out of 5 starsReviewed on 11/25/2025
He is amazing, listens to your concerns and is very caring
- 5 out of 5 starsReviewed 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 starsReviewed on 11/21/2025
Doctor Yiu was outstanding in every area of my concern.
- 5 out of 5 starsReviewed on 11/21/2025
Very thorough. Explains in detail.
- 5 out of 5 starsReviewed on 11/21/2025
DR is the Best!!
- 5 out of 5 starsReviewed on 11/21/2025
This provider is very good and professional and cares about his patients!
- 5 out of 5 starsReviewed 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 starsReviewed on 11/19/2025
Shows concern Friendly Thorough
- 5 out of 5 starsReviewed on 11/18/2025
Excellent!
- 5 out of 5 starsReviewed on 11/14/2025
Professional and respectful
- 5 out of 5 starsReviewed on 11/13/2025
Treatment was good and did a great job with me
- 5 out of 5 starsReviewed on 10/28/2025
Appreciated the prayer
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed on 10/23/2025
Very kind, patient, respectable and knowledgeable
- 5 out of 5 starsReviewed 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 starsReviewed on 10/10/2025
My eyes have improved greatly since seeing and following Dr. Yiu's directions.
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed on 10/3/2025
Dr Yiu is a very compassionate and caring doctor. I highly recommend him.
- 4 out of 5 starsReviewed on 9/30/2025
Hes ok. He took care of my eye, at my eye surgery.
- 5 out of 5 starsReviewed on 9/30/2025
Excellent Customer Focus Experience
- 5 out of 5 starsReviewed on 9/25/2025
Takes the time and is very thorough.
- 5 out of 5 starsReviewed on 9/25/2025
Very professional, kind, and gentle.
- 5 out of 5 starsReviewed on 9/25/2025
The doctor is a very kind & considerate & very knowledgeable .
- 5 out of 5 starsReviewed on 9/25/2025
Dr Yiu is not only a good physician but very caring.
- 5 out of 5 starsReviewed on 9/23/2025
All good
- 5 out of 5 starsReviewed on 9/23/2025
Excellent, caring provider
- 5 out of 5 starsReviewed on 9/23/2025
Excellent help and advice re vision and correction of vision.
- 5 out of 5 starsReviewed 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 starsReviewed on 9/9/2025
He went out of his way to attend to my illness in a timely manner.
- 5 out of 5 starsReviewed on 9/9/2025
The best
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed on 8/29/2025
Professional and caring about patients health
- 5 out of 5 starsReviewed on 8/29/2025
Wore an mask. Excellent!
- 5 out of 5 starsReviewed 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 starsReviewed on 8/26/2025
Very professional. Listened carefully to family visual history.
- 5 out of 5 starsReviewed 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 starsReviewed on 8/19/2025
All thing was excellent
- 5 out of 5 starsReviewed 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 starsReviewed on 8/14/2025
Dr Yiu is a marvelous Doctor We are so grateful for his care
- 5 out of 5 starsReviewed on 8/12/2025
VERY BEST COMMUNICATOR, GENUINE
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed on 7/24/2025
he was a very thorough exam, and the overall experience was extraordinarily professional
- 5 out of 5 starsReviewed 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 starsReviewed on 7/24/2025
Dr. Yiu is an excellent doctor and fine man. I look forward to my visits.
- 5 out of 5 starsReviewed 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 starsReviewed on 7/22/2025
Excellent
- 5 out of 5 starsReviewed on 7/15/2025
Wonderful -attentive-thorough!!
- 5 out of 5 starsReviewed on 7/11/2025
He is execlent to help my needs
- 5 out of 5 starsReviewed 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 starsReviewed on 7/1/2025
Provider was great. Have been unable to schedule a required follow-up
- 5 out of 5 starsReviewed on 7/1/2025
Very nice very helpful and very information
- 4 out of 5 starsReviewed 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 starsReviewed on 6/20/2025
The doctor took his time to explain my situation and was very professional.
- 5 out of 5 starsReviewed on 6/19/2025
He is awesome and gives full attention when with me.
- 5 out of 5 starsReviewed on 6/17/2025
Dr Yiu is very personable and a very caring health provider.
- 5 out of 5 starsReviewed on 6/5/2025
Dr. Yiu was amazing. Very professional, yet friendly, he explained everything with patience and empathy.
- 5 out of 5 starsReviewed on 6/3/2025
Very good service
- 5 out of 5 starsReviewed 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 starsReviewed 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 starsReviewed 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 starsReviewed on 5/9/2025
Thorough, attentive, and concerned.
- 5 out of 5 starsReviewed 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 starsReviewed on 5/6/2025
Very nice and concerning
- 5 out of 5 starsReviewed on 5/2/2025
A caring, friendly man who has excellent patience and is a very concerned person.
- 5 out of 5 starsReviewed on 5/1/2025
Dr Yiu is at the top of his craft. I have total confidence in him.
- 4 out of 5 starsReviewed on 4/22/2025
He's good. But requiring follow ups that JHMI can't schedule in a timelly manner
- 5 out of 5 starsReviewed on 4/17/2025
He is very polite and very caring.
- 3 out of 5 starsReviewed 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