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Maryland Eye Associates is a group practice of board certified ophthalmologists, with an office in Prince Frederick, Maryland. Our specialized team takes great pride in our level of patient care and we all live and work by our motto to be "Dedicated to Preserving and Restoring Sight." Click below to learn more about each of our providers.

Erin P. Benjamin, D.O.

Erin-Benjamin DODr. Erin P. Benjamin is a licensed, board-certified ophthalmologist at Maryland Eye Associates. She specializes in pediatric ophthalmology, strabismus and general ophthalmology, including micro-incision cataract surgery. In addition, Dr. Benjamin is trained to diagnose and treat a wide variety of other eye conditions including glaucoma, dry eye and ocular infections.

Dr. Benjamin completed her medical school training at Philadelphia College of Osteopathic Medicine and her ophthalmology residency through Michigan State University at Hillsdale Community Health Center. After residency, Dr. Benjamin completed a fellowship in pediatric ophthalmology and strabismus at Akron Children’s Hospital. As a medical student, she traveled to Africa and India to work with patients. In 2020, Dr. Benjamin completed her fellowship with the American Osteopathic College of Ophthalmology.

Raised in South Jersey, Dr. Benjamin is excited to return to the mid-Atlantic to provide patients in Maryland with the newest advancements in pediatric and general eye care.


  • Akron Children’s Hospital, Akron, OH, Fellowship in Pediatric Ophthalmology and Strabismus
  • Michigan State University, Hillsdale Community Health Center, Hillsdale, MI, Ophthalmology Residency
  • Philadelphia College of Osteopathic Medicine, Philadelphia, PA, D.O.
  • Franklin & Marshall College, Lancaster, PA, B.A. in Neuroscience


  • American Academy of Ophthalmology
  • American Academy of Pediatric Ophthalmology and Strabismus
  • American Osteopathic Colleges of Ophthalmology and Otolaryngology-Head and Neck Surgery
  • American Osteopathic Association

Marc Berry, M.D.

Marc Berry MDMarc L. Berry, M.D., is a licensed comprehensive ophthalmologist who was board certified in 1997. He has been with Maryland Eye Associates since 2013. As a comprehensive ophthalmologist, he diagnoses and treats a myriad of ocular conditions including dry eye, ocular infections and glaucoma, with an emphasis on diabetic retinopathy. He has over 20 years experience in clinical ophthalmology and currently practices medical ophthalmology at Maryland Eye Associates.


  • Howard University Hospital - Ophthalmology Residency
  • Washington Hospital Center - Internal Medicine Internship
  • Howard University College of Medicine - Doctor of Medicine
  • University of Cincinnati - Bachelor of Science Chemistry/Biochemistry

Professional Memberships

  • American Academy of Ophthalmology
  • American Medical Association
  • National Medical Association

Diane T. Chang, M.D., Ph.D.

Diane Chang MDDiane Chang, M.D., Ph.D., is a board certified comprehensive ophthalmologist who joined the physicians at Maryland Eye Associates in 2015. Dr. Chang obtained her medical degree and her Ph.D. in Pharmacology at the University of Pittsburgh School of Medicine/Carnegie Mellon University Medical Scientist Training Program. She completed her residency at the Mount Sinai School of Medicine in New York, where she served as Chief Resident. Dr. Chang is a member of the American Academy of Ophthalmology and the American Society of Cataract and Refractive Surgery. 

In addition to performing cataract surgery, she treats patients with a wide variety of eye conditions, including dry eye syndrome, glaucoma, ocular inflammation, macular degeneration and eye emergencies.

Jason B. Wanner, D.O.

Jason Wanner DOJason B. Wanner, D.O., is a glaucoma specialist and board certified ophthalmologist. Dr. Wanner’s practice focuses on glaucoma and cataract management including the most advanced medical and surgical treatments available. He currently sees patients in the Prince Frederick office. 

Dr. Wanner completed a glaucoma fellowship at Harvard Medical School/Massachusetts Eye and Ear Infirmary. While at Harvard he trained with world leaders in the field of glaucoma. He did his residency training in ophthalmology at the Philadelphia College of Osteopathic Medicine where he had the honor of being chief resident. He attended medical school at Des Moines University in Iowa and was a member of the Sigma Sigma Phi National Osteopathic Honor Society. Dr. Wanner received his undergraduate degree in Business Administration from the University of Wisconsin-Madison where he graduated with Distinction. He was raised in the suburbs of Chicago.  

Dr. Wanner has lectured at national ophthalmology meetings as well as to audiences of local health care professionals. He is a member of the American Academy of Ophthalmology and the Chandler-Grant Glaucoma Society. Dr. Wanner has published articles on medical and surgical treatments in glaucoma.

Dr. Wanner is married to Melissa, a pharmacist, and has three children. He is very active in coaching youth athletics. The Wanners enjoy living in Maryland and all that it has to offer, especially activities on the Chesapeake Bay.