the eye doctors at Boas Vision Associates
Meet our optometric team in Exton, PA. We offer a full range of eye health services to patients of all ages - all with personalized attention and a smile. In our eye care office, every patient is treated warmly. Individualized attention is the foundation of our care, to ensure that your eyes remain healthy. We're dedicated to optimizing your vision!
Meet Our Eye Doctors

Dr. Mark Boas is the co-founder and medical director of Boas Vision Associates, LLC (previously Drs. Mark and Suzanne Boas). Along with his wife, Dr. Suzanne Boas, Dr. Mark has been serving the eye care needs of the Exton/Lionville area residents since 1989. Boas Vision Associates is a full-scope, primary eye care practice that offers a full range of services including routine medical eye care, treatment of ocular diseases, such as cataracts, glaucoma, dry eye disease, diabetic retinopathy, macular degeneration, and the fitting of routine and specifically contact lenses. Of particular interest is the practice's attention to functional vision care...
Dr. Suzanne Olmstead Boas is co-founder of Boas Vision Associates. She attended High Point College in North Carolina for her undergraduate studies in Biology., Chemistry, and Psychology. She then attended Pennsylvania College of Optometry in Philadelphia, where she received her Doctorate of Optometry degree in 1986. She completed externships at the Lynch Pediatric Unit at The Eye Institute, The Veteran's Administration Hospital in Philadelphia, and a private practice specializing in contact lenses and children's vision. Drs. Gauvreau & Ritter in Westbrooke Maine, Dr. Suzanne, and her husband, Dr. Mark Boas, opened their private practice together in 1989 and have been...
Dr. Marie Gwinn (formerly Boas) joined the practice in mid 2017. Dr. Marie grew up in the Exton/Elverson area and attended Owen J. Roberts High School, followed by West Chester University for her undergraduate studies. Dr. Marie went on to attend The Pennsylvania College of Optometry where she received several honors. She served on the board of the Pennsylvania Optometry Student Association and the Student Optometric Service to Humanity. Dr. Marie was a member of Beta Sigma Kappa International Optometric Honor Society and Gold Key International Optometric Honor Society. She was awarded Clinical Excellence in the Pediatric Internship at The...
Dr. Katherine R. Boas graduated magna cum laude from Franklin and Marshall College with a Bachelor of Arts in Biology. She received many awards and honors within her major, one of which gave her the opportunity to develop a pilot public health project with The Brien Holden Vision Institute while studying abroad in Sydney, Australia. The project sent her to Phnom Penh, Cambodia where she worked to improve access to eye care. Dr. Katherine then went on to attend The Pennsylvania College of Optometry at Salus University where she graduated magna cum laude with clinical distinctions in primary care and pediatrics. ...