Advanced and sophisticated imaging technology comes to our practice!


Our practice has just purchased an advanced corneal tomographer called the Oculus Pentacam. This advanced device allows us to visualize and quantify both the anterior and posterior surfaces of the cornea. We are one of only two private practices in San Francisco with this type of device.

A traditional corneal topographer is a machine that many optometric and ophthalmology practices own and gives you basic information about the curvatures of the cornea. A topographer is able to quantify the amount of astigmatism that is in the eye using concentric Placido discs. Astigmatism refers to the oval-like or football-like shape of the front refractive surface of the eye. Astigmatism can be corrected with glasses, contact lenses, LASIK, or Toric intraocular lenses during cataract surgery. There are also certain eye diseases that can lead to abnormal astigmatism, causing distorted vision and difficulty seeing and tolerating the usual glasses or contact lenses (e.g., Keratoconus). A topographer is only able to map out the front surface of the cornea.

A corneal tomographer (like the Oculus Pentacam or the Galilei G4) is much more advanced and allows us to visualize using Schiempflug imaging technology both the front AND back of the corneal surfaces. Knowing the back surface of the cornea and its shape allows to gain even more insight into total astigmatism and the overall power of the cornea, which can affect refractive outcomes and vision with contact lens fittings, and after LASIK, PRK, or cataract surgery. The difference can mean good vision versus outstanding vision! It allows us to also take a picture of the angle of the eye and measure corneal thickness at the same time, which is important in diagnosing glaucoma and even conditions where there is an abnormality in the ciliary body or iris. The scan itself only takes 2 seconds and is painless and quick.

We at Eyecare Associates of San Francisco are excited to offer this technology now for all of our patients who come to our downtown Union Square office!


Dr. Peggy Zeng joins our Eyecare team!


We are so delighted that Dr. Peggy Zeng, a San Francisco native, has joined us as our new board-certified optometrist. She has over 5 years of clinical experience in the Bay Area practicing general optometry alongside ophthalmologists.

She is available for routine eye exams as well as any eye emergencies. She is available to see patients at our downtown Union Square office on Thursdays and Fridays, and at our Stonestown office on Wednesdays.

We are moving!!


As of next Monday, October 30, 2017, our downtown Union Square office will be moving one block to the Tiffany's Building at Union Square. 

Our new address will be: 360 Post Street, Suite 1005, San Francisco, CA 94108.

Please be aware if you have a scheduled appointment with any of our doctors on or after October 30th, we will no longer be at our 490 Post Street location. 

We look forward to seeing you in our new space!


Summer 2017 News!

Summer is here, and there is nothing more indicative of that than the longer days, sunny skies, dry weather, and (for some unlucky few) the onset of seasonal allergies here in San Francisco. Although there are many over-the-counter, non-prescription remedies for allergies, some people who suffer from severe eye itching, discharge, and redness require stronger prescription eye drops and treatment. Come see us if you are ailing from itching, watery eyes; we'd be happy to help!

We were also happily surprised this year by a recognition by Yelp, the pervasive global customer-driven review website/app. We were awarded this year as a business where "People Love us on Yelp." This is our first distinction by Yelp, and we are very honored by it. We want to thank all our patients who found us on Yelp and to those who spent time and wrote us a review. While we aren't perfect, we strive as a business and practice to give the best-in-class patient care, customer service, and attention from our entire staff - from the moment you walk in our door. Thank you to Yelp and to our loyal patients for their continued support and feedback!

Dr. Negin Agange joins Eyecare Associates of San Francisco

San Francisco Ophthalmologist, Negin Agange

Dr. Negin Agange, M.D., M.B.A. will be joining us officially on November 7, 2016.

We are so very delighted to announce the addition of a new ophthalmologist to our eye care team in San Francisco. Dr. Agange is an exceptionally trained medical retina and comprehensive ophthalmologist from UCLA/Jules Stein and Doheny Eye Institutes who will be providing comprehensive medical and surgical eye care as well as medical retina care to our patients at both office locations. She specializes in the treatment of diabetic retinopathy, macular degeneration, vein occlusions, and other retinal diseases.

Dr. Agange received her M.D. and M.B.A. from UC Irvine Medical school and did her residency training at University of Texas, San Antonio, where she was chief resident. She speaks Spanish and fluent Farsi. She is a devoted clinician, teacher, wife, and mother to her new little baby boy. She is excited to meet you and is thrilled about the opportunity to care for your eye health!

Dr. Tan performs first Tecnis Toric Symfony IOL implant in San Francisco

There is quite a bit of buzz surrounding the recent FDA approval of the AMO Tecnis Symfony intraocular lens implant for cataract surgery patients.  The Tecnis Symfony lens implant which was FDA approved on July 15, 2016, is a completely new category of implant that gives an "Extended Depth of Focus" to patients desiring independence from glasses after cataract surgery.  

"The striking advantage of this new lens implant in my opinion is giving a new surgical option to patients who desire spectacle independence but have significant astigmatism, macular disease, or other factors which traditionally have made them poor candidates in the past for a multifocal lens," Dr. Tan says.  "Those patients who did not want to risk having glare and haloes who want reasonable close up vision after surgery now also have an excellent choice."

There are currently generally three categories of intraocular lens implants available to cataract surgeons:  Monofocal implants, Toric astigmatic implants (for astigmatism), and Multifocal lens implants. The addition of the Tecnis Symfony line allows for an increased depth of focus so that distance, intermediate, and some near vision can be obtained without sacrificing loss of contrast sensitivity and adding glare/haloes to vision, which are often encountered by patients who elect to have a Multifocal lens implanted.  The way this works is by both treating chromatic aberration (by focusing all the color components in light and their variable refractive properties) and through the use of diffractive optics.  

The results of the FDA trial showed that the Tecnis Symfony performed much better for intermediate and near vision. 77 percent had good intermediate distance vision of 20/25 with the Tecnis Symfony lens, compared with 34 percent of those with a monofocal lens.  For reading, the Tecnis Symfony patients could read two additionally smaller lines than those with a monofocal lens.  Both monofocal and Tecnis Symfony lenses had similarly good distance vision.  The results and press release from the FDA are available below:

Union Square Office Makeover!

As some of our patients have noticed, the waiting room at our Union Square Office on 490 Post Street in San Francisco has been redesigned and expanded. We are so excited for our patients to be in a more open and inviting space, as if it were your own living room. Before you get your eye exam, feel free to enjoy the music, read the magazines, and sip some refreshments.

Have a glimpse of the new waiting room below. We hope the next time you step into our Post Street office, you'll enjoy the changes.

Our 1st Family and Friend's Event is a huge success!

friends and family event at Eyecare Associates

1st Family and Friend's Event for July 2016

As leaders in optometry and ophthalmology in the San Francisco Bay Area, we care about our family's and friends' eye health. We are offering our ECASF staff free vision exams and we invite their loved ones to take advantage of our exclusive discounts at our 1st Friends and Family event for the entire month of July 2016! The current response has been wonderful and we are excited to meet new patients and see existing ones again.

We still have one week left for you to make an optometrist appointment for July 2016! Please call us to make a vision exam appointment with your experienced optometrists at our Union Square or Stonestown offices in San Francisco, California.


  1. $50 Eyeglasses Vision Exam or $85 Contact Lens Vision Exam (Includes Eye Health Evaluation + Rx)
  2. WAIVED CO-PAY if you have a eligible VSP, EyeMed, or MES Vision Insurance plan.
  3. 30% off any Brand Named Sunglasses (including Prada, Ray-Bans, Gucci, Tom Ford, & Roberto Cavalli)
  4. 25% off any name-brand* Frames (including Prada, Tiffany’s, Tom Ford, Gucci; consignment frames excluded)
  5. 20% off any lenses (Single Vision, Bifocal, and Progressives)


Just show this event to our front desk at check in to get any of the discounts.


We are on Yelp! We’d love to hear your comments and learn what we are doing right or how we can improve.

Our optometrists, Dr. Anh Tran and Dr. Reshma Shah, and our opticians, Arlene, Carmen, and Chris, are excited to see you and as always, are happy to answer any questions you have about your eyes.


Union Square Office
490 Post Street, Suite 640
San Francisco, CA 94102
(415) 982-2020

Stonestown Office
595 Buckingham Way, Suite 448
San Francisco, CA 94132
(415) 564-1060

Say No to Contact Lens Infections!

According to the CDC, over 30 million patients in the US wear contact lenses. 

And more than over 40% of them do not follow proper contact lens maintenance. A lot of our patients wear contact lenses and often ask us what constitutes good contact lens hygiene. Dirty contact lenses can cause pink eye or even a corneal ulcer, which is serious and cause permanent vision loss if untreated.  However, with a little knowledge, contact lenses are actually quite easy to maintain and you can take these easy steps outlined below to prevent any eye irritation and infections.

1. Always wash your hands. 

Our hands are constantly in contact with our phones, keyboards, door knobs, food, and so much more. Removing all the bacteria and viruses by washing your hands with soap and water will prevent these critters from getting into the contact lenses, and ultimately, into your eye.

2. Clean your contact lens case. 

The contact lens case stores your contact lenses safely so they do not dry out. However, they can be a nasty incubator of bacteria if not properly handled. We recommend that you pour fresh contact lens solution into the cases to rinse them and leave them on a tissue or paper towel to dry during the day when the lens case is empty. Be sure to also replace your contact lens case about every 3 months.

3. Use FRESH contact lens solution every time. 

The old contact lens solution may be contaminated with bacteria from the day before. It is essential to use new solution every time to avoid bacterial infections such as a rare but terrible infection known as Acanthamoeba keratitis, which may cause severe eye pain, corneal ulceration, and even permanent visual impairment or blindness.

If you have any questions about your contact lenses, always feel free to ask our optometrists, Dr. Anh Tran and Dr. Reshma Shah. They can provide you with more information and tips on how to take care of your contact lenses and cases. If you are interested in trying out a new contact solution or lens case, we have trial bottles from popular brands like BioTrue by Bausch + Lomb®, Opti-Free by Alcon®, and CLEAR CARE®.

Dr. Kevin Tan speaks to 500 optometrists about eye diseases and treatments

San Francisco Ocular Symposium 2016

"It is so very important for optometrists and ophthalmologists to be educated so they can stay updated on treating and empowering their patients as front-line practitioners."

Ocular Symposium 2016 kevin tan
Ocular Symposium 2016 kevin tan 2

On June 6, 2016, Dr. Tan was invited to speak in front of over 500 San Francisco-Bay Area Optometrists and eye doctors at the annual Ocular Symposium 2016.  He spoke on the diagnosis and treatment of corneal diseases, infections, and degenerations as part of a distinguished panel of Ophthalmology experts from around Northern California. Also presenting were Dr. Mark Mandel, Dr. David Chang, Dr. Marc Lieberman, and other leaders in the field.  Optometrists and other eye physicians from around the country came to hear about the latest in ophthalmic diagnosis and treatment.

Dr. Kevin Tan Educates Fellow Eye Doctors

The conference is held annually at the Holiday Inn in San Francisco, CA.  The presentation provided new knowledge and allowed for leaders in Ophthalmology and Optometry to share their pearls on the latest in management of eye disease.  "It is so very important for optometrists and ophthalmologists to be educated so they can stay updated on treating and empowering their patients as front-line practitioners,” said Dr. Tan.  “This was my first Ocular Symposium, and I have to say that it was truly stimulating and invigorating to be able to stand before my fellow peers and ophthalmic professionals and discuss real cases and share strategies in clinical practice.”

More About Our San Francisco Eye Doctor

Dr. Tan is a comprehensive ophthalmologist at our practice and specializes in cornea/anterior segment, cataract and refractive surgery, glaucoma, and oculoplastics.  He is a member of the American Academy of Ophthalmology, the California Academy of Eye Physicians and Surgeons, and the San Francisco Medical Society.   He serves as clinical and volunteer faculty at the California Pacific Medical Center in San Francisco.

san francisco eyecare associates team

Welcome to Our Newsfeed!

Introducing the Eyecare Associates of San Francisco Newsfeed!

Here you will find the latest information on our San Francisco offices, as well as updates on the latest in ophthalmology and optometry news.

One of the most frequently asked question is about the cost of LASIK.  Laser vision correction is a great way to decrease dependency on glasses and contacts. Although insurance does not cover LASIK or PRK, the savings over many years of buying glasses or contacts can be substantial.  We like to be completely transparent about our fees at our practice, so here is how much the procedure will cost you. Bear in mind that these costs include the pre-operative evaluation, procedure, and all post-operative visits up to 1 year.  Dr. Tan is often able to also provide the post-operative eye drops for you, free of charge.

All-laser custom Wavefront LASIK:  $5,500 for both eyes
Conventional LASIK:  $4,500 for both eyes
Wavefront PRK:  $4,500 for both eyes
Glasses/contacts:  Estimated $500/year, or $10,000 over 20 years

Visit Our San Francisco Eye Doctors for a Consultation

LASIK or PRK is recommended only after a thorough evaluation, and not all patients qualify. If you have questions about LASIK, we recommend that you come in for a consultation with Dr. Kevin Tan or with one of our highly knowledgeable optometrists, Dr. Reshma Shah and Dr. Anh Tran. They are happy to answer any of your questions about the procedure and will help determine whether you are a good candidate. Below is an excerpt from a recent Yelp review by Mark O. of San Francisco, who highlighted his experience with Dr. Tan.

“All in all the operation was over in probably less than 10 minutes and after resting for a few hours I could notice my vision was already better than without glasses, and it seemed to progressively get better through the night.  I e-mailed Dr. Tan that night with some questions about eye maintenance and making sure I understood the recovery protocol.  He responded within minutes!  After my checkup the very next day I discovered I now have 20/15 vision, better than with glasses!
Dr. Tan was great the entire process from beginning to end.  I'm really glad I chose him as my doctor for LASIK.  He also works out of two offices, one near Stonestown Mall and the other near the financial district, both were convenient to me at different times.

Good luck with your decision to do LASIK or not and which doctor to choose, but I didn't go wrong.”

Eyecare Associates of San Francisco