If you have a refractive error, such as nearsightedness, farsightedness, or astigmatism, Refractive Surgery is a method for correcting or improving your vision. For many patients, Refractive Surgery allows them to see better than at any other time in their lives.
We offer the most recent advancements in laser eye surgery technology to ensure better outcomes and increased safety while delivering the highest quality of care. Our experienced team of faculty optometrists and ophthalmologists provide personalized eye care and top-notch surgical skills.
Top rated surgeons
Our surgeons specialize in cornea and refractive surgery. They are fellowship-trained from some of the most prestigious medical schools in the country and have over 30 years of combined LASIK and PRK surgical experience. The optometric team that evaluates and performs the pre- and post-operative care has experience in over 20,000 cases of laser refractive surgery. Please click on a plus sign (+) below to read more about each of our doctors.
Andrew L. Sorenson, M.D. is a fellowship-trained specialist in refractive surgery, corneal transplantation and cataract surgery. After graduating from Stanford University, he obtained his medical degree from the University of California, San Diego and completed ophthalmology residency training at California Pacific Medical Center in San Francisco. To complement his training, Dr. Sorenson completed a year-long Cornea and Refractive Surgery fellowship at Duke University Eye Center and was awarded the Duke Eye Center Hornaday Fellow Award for excellence in patient care and resident education. Dr. Sorenson returned to Berkeley where he joined his father, brother and niece in their comprehensive ophthalmology practice which has been serving patients in the East Bay Area since 1952.
Dr. Sorenson’s refractive surgery offerings include LASIK, PRK, PTK, Intralase, Wavefront-guided treatments, Verisyse implantation, refractive lens exchange, corneal inlays and other vision correction procedures.
Dr. Sorenson is an Assistant Clinical Professor at UC Berkeley School of Optometry, serves as the Medical & Surgical Director of the Refractive Surgery Center, is the Chief of Ophthalmology at Alta Bates Medical Center in Berkeley, and is heavily involved with international eye care in Guatemala through La Hospital de la Familia.
Mira Lim, M.D. is a fellowship-trained ophthalmologist specializing in cornea and refractive surgery. She earned her medical degree from Tufts University School of Medicine in Boston and completed ophthalmology residency training at Weill-Cornell University in New York , where she was awarded the Distinguished Housestaff Award for all-around excellence. To complement her training, Dr. Lim completed a year-long Cornea, Refractive Surgery, and External Disease fellowship at Harvard Medical School/Massachusetts Eye and Ear Infirmary, where she trained on the latest bladeless/Intralase LASIK technology.
Dr. Lim’s refractive surgery offerings include LASIK, PRK, PTK, Intralase, Wavefront-guided treatments, refractive lens exchange and other vision correction procedures.
Dr. Lim is an Assistant Clinical Professor at UC Berkeley School of Optometry and for ophthalmology residents at California Pacific Medical Center in San Francisco. She is actively involved in teaching the ophthalmology residents at Highland Hospital in Oakland. She performs cataract, corneal transplantation, and other cornea surgeries at Alta Bates Hospital in Oakland and at John Muir Hospital in Walnut Creek.
Dr. Lim shares a cornea-based private practice, Northern California Cornea Associates, with her partners Dr. David Vastine and Dr. David Demartini. She splits her time between two offices located in Oakland and Walnut Creek.
Dr. Kathy Tran received her Doctorate of Optometry in 2005 from the UC Berkeley School of Optometry. She then completed a residency specializing in Cornea-Contact Lenses with a minor in Ocular Disease before joining our faculty in 2006. Dr. Tran is Chief of the Refractive Surgery Center. She has extensive experience in the care of laser vision correction patients. Dr. Tran also serves as Chief of the Cornea and Contact Lens Clinic at the UC Berkeley School of Optometry. She has a background in specialty contact lens fitting, including for keratoconus, post-corneal transplants, irregular cornea, prosthetics, orthokeratology, astigmatism, and presbyopia.
Dr. Tran is an Assistant Clinical Professor teaching third and fourth year optometric interns and residents in patient care at the Meredith Morgan University Eye Center. She lectures on the topics of Refractive Surgery, Contact Lenses, and Dry Eye. Dr. Tran worked in private practice before becoming a full-time faculty member. She performed annual vision screenings for the San Francisco 49ers team from 2006-2013. She is a Fellow of the American Academy of Optometry. Dr. Tran had successful LASIK surgery in 2003 and is excited to speak to patients about laser vision correction.
Since 2000, the Refractive Surgery Center has proved itself a regional center for excellence in refractive surgery. Our doctors can help you choose the right solution to achieve your vision goals. Our goal is to provide each patient with the facts and resources needed to make the best decision for each individual.
We perform a thorough evaluation to determine if you are a candidate for laser vision correction. This includes a careful analysis of the cornea using the Oculus Pentacam™ HR anterior segment tomography unit. The Pentacam provides a high-resolution scan and offers more information about the cornea than most other units available today. It is considered the gold standard in refractive surgery screening. We will evaluate your refractive error, ocular health and medical health to determine if you are a good candidate for surgery.
A computer-guided, ultra-fast femtosecond laser creates the corneal flap, replacing the hand-held blade historically used in creating LASIK corneal flaps. This advanced technology provides unparalleled uniformity and precision, biomechanical stability, and an unsurpassed safety profile. In the next step, an excimer laser precisely reshapes the cornea to correct myopia, hyperopia, and astigmatism. Custom wavefront treatment provides personalized treatment resulting in a high level of precision and accuracy for best visual outcomes.
Some patients may be better suited for Photorefractive Keratectomy (PRK). PRK uses an excimer laser to gently and accurately reshape the surface of the cornea. No flap is created and after treatment, a transparent "bandage" soft contact lens is placed over the eye for 1 week to promote healing. Vision is functional after the first week, however, full visual recovery is typically achieved in 2-3 months. PRK, like LASIK, can correct myopia, hyperopia, and astigmatism. Custom wavefront treatment is also available for PRK. Statistical vision outcomes for PRK are equivalent to LASIK. PRK may be preferred for patients with thinner corneas, dry eyes, and safety concerns due to occupation, sports, and hobbies.
The main difference between LASIK and PRK are surgical steps to access the cornea and recovery time. However, both LASIK and PRK deliver similar final visual outcomes. Both LASIK and PRK are safe and effective laser vision correction procedures.
-Mild discomfort and pressure sensation for seconds during flap creation
-Short-term pain and discomfort for 2-3 hours
-Quick visual recovery time
-No flap complications
-Comfortable during surgery
-Minimal surgical risks
-Relative pain and discomfort for 2-3 days
-Gradual and slower visual recovery
Our Refractive Surgery Center uses the newest, state of the art technology for laser vision correction. This includes the OCULUS PENTACAM, iDESIGN, STAR S4 IR EXCIMER LASER, and INTRALASE iFS LASER. For more information on our advanced technology, please visit our Refractive Surgery Advanced Technology page.
Our fee includes a comprehensive pre-operative exam, surgery, and post-operative care for six months, as well as any re-treatment (enhancement) procedure for two years. Please click on the plus sign (+) below for more information, or call us at (510) 643-2860 .
We offer a discount of $1000 off to members of major vision plans including Vision Service Plan (VSP), EyeMed, Medical Eye Services (MES), Kaiser Members, U.C. Berkeley alumni, staff, and faculty. Currently enrolled UC Berkeley students receive an unparalleled double discount of $2000 off.
We accept Cash, Personal Checks, Visa, Mastercard, American Express, and Discover Card.
Employer Flexible Spending Accounts and Health Savings Accounts are welcome.
We will provide a documented receipt.
We offer complimentary consultations to determine if you are a candidate for laser vision correction.
Is Refractive Surgery right for me?
Eye surgery can free you from glasses and contact lenses, but it’s not right for everybody. Answering the questions below will help you determine if you are a good candidate.
- Have your eyes fully developed? Refractive surgery is FDA-approved for people aged 18 and older who have achieved ocular maturity.
- Has your prescription remained stable— meaning it hasn’t changed—for at least two consecutive years?
- Are your eyes healthy? It is important for the eyes to be free of diseases, injuries, and infections.
Refractive Surgery Facts
We offer complimentary consultations! Please call to set up an appointment with Dr. Kathy Tran, Chief of the Refractive Surgery Center.
Our surgeons have over 30 years of combined LASIK and PRK surgical experience.
Appointments can be made in person or by telephone.
Refractive Surgery Center
UC Berkeley Optometry
200 Minor Addition
Berkeley, CA 94720-2020
Dr. Kathy Tran, OD, FAAO
Associate Clinical Professor