Our Doctors

Avant LASIK Spa is thrilled to have Ophthalmologist Nilesh M. Sheth, MD, MPH as our principal refractive surgeon. Having performed over 25,000 laser vision correction procedures, Dr. Sheth is highly skilled among fellow LASIK surgeons and considered a leader in his field.

Born and raised in the Detroit Metropolitan area, Dr. Sheth received his Bachelors and Masters degrees at the University of Michigan, followed by his Doctor of Medicine Degree at Wayne State Medical School, graduating with honors from all three. He completed his Ophthalmology residency at one of the prestigious Cleveland Clinic programs. Dedicated to becoming an expert in refractive surgery, Dr. Sheth is among an elite group of surgeons who continued on to fulfill a fellowship at the university where refractive surgery first began, Louisiana State.

Since becoming a Board Certified Ophthalmologist as well as a Cornea & Refractive surgery specialist, Dr. Sheth has been involved in and contributed to many research studies and publications within his field. As a respected surgeon and educator, he is currently a staff member at the Massachusetts Eye and Ear Infirmary, a teaching hospital of the Harvard Medical School.

Nilesh Sheth, MD believes that Ophthalmology remains a rapidly transforming field and strives to offer patients the best evaluations, treatments and procedures currently available. He uses modern techniques and devices to provide his patients with optimal results.

Because of his focus on patient care while providing the best possible visual results, friends, family, and even colleagues have trusted their vision to Dr. Sheth. His most notable patients include U.S. Senator Scott Brown, Boston Celtics great Jo Jo White as well as actor John Fiore (Law & Order and The Sopranos).

Professional Memberships & Affiliations:

• American Academy of Ophthalmology
• American Society of Cataract & Refractive Surgeons
• International Society of Refractive Surgery
• American Medical Association

Ever since I was young, I always had an interest in both the scientific aspect of medicine and the benefit and satisfaction of helping people. I enjoy coming to work every day and I am very passionate about my work.
– Nilesh Sheth, MD

Dr. Sonya Sheth joined Avant LASIK Spa in 2017. She has a wide variety of experience in specialty contact lenses, Ocular Disease, and Pre & Post Management of Ocular Surgery. She has been practicing for over 20 years, and holds licenses in 6 other States.

Dr. Sheth was born and raised in Chicago, and received her Doctorate degree from the Illinois College of Optometry, where she also graduated with another Bachelor’s degree in Visual Science. Prior to her Optometry career, Dr. Sheth earned her Bachelor’s degree in Biology with a minor in Business from Loyola University of Chicago.

Dr. Sheth has participated in more than 65 clinics all over the world for charity. “It’s an amazing feeling when you give sight and quality of life to someone who would never had access to eyecare.”

Dr. David Chiang has been in practice for over 20 years. He received his Bacheors of Science in Biology with a minor in Theater from the University of California at San Diego and his Doctorate in Optometry from the New England College of Optometry. He has current therapeutic Pharmaceutical Certification in New York and Massachusetts.

Dr. Chaing brings his experience in different practice settings including glasses, contact lenses, ocular disease, and more than 15 years comanaging over 30,000 LASIK and PRK eye surgeries.

Dr. Chiang is very passionate about his profession and takes great pride in providing the best vision care that is focused on the needs of each individual patient.

Dr. Fei Siu received her Bachelor’s degree in Biology from Cornell University, and attained the degree of Doctor of Optometry from New England College of Optometry. She was one of thirteen optometry scholarship recipients of the United States Navy’s Health Professions Scholarship Program nationwide in her graduation year. Upon completion of her course work, she started her career as a doctor of optometry at Naval Medical Center San Diego. She completed her service obligation at the rank of Lieutenant Commander, having deployed on Pacific Partnership, a humanitarian mission to provide healthcare and education, including eye care, in the Pacific and southeast Asia, aboard USNS Mercy.

Since moving back to Boston and joining Sheth Horsley Eye Center, Dr. Siu has been providing personalized and thorough eye care to patients with cataracts, floaters, macular degeneration, ocular emergencies, and other ocular conditions. She performs examinations for early detection of glaucoma, diabetic retinopathy, and other eye manifestations of systemic conditions. In addition, she performs refractive surgery pre- and post-operative exams, and prescribes glasses/fits contact lenses, including lenses for astigmatism and presbyopia.

Dr. Siu grew up in Hong Kong and Hawaii. She is fluent in English, Cantonese, and Mandarin.