Support Advancements in Research


or Use Our Simple Online Form to Give Us Feedback

We welcome your comments and feedback. Please include contact information if you'd like a response.

Did you find this page helpful?

If you would like a response, please include your contact information.

John I. Loewenstein, M.D.

Harvard Medical School

Associate Professor of Ophthalmology, Department of Ophthalmology
Vice Chair for Education

Massachusetts Eye and Ear

Associate Clinical Chief of Ophthalmology
Associate Chief of Ophthalmology Education
Senior Scientist



Center Affiliations

Research Summary

Dr. Loewenstein's clinical practice focuses on diseases of the retina and vitreous. He conducts research in surgical education, leading the development of computer based cognitive simulations to teach cataract surgery and screening for retinopathy of prematurity. He developed a formal surgical curriculum for the Harvard Medical School Ophthalmology Residency Training Program, which significantly increased the number and quality of resident cataract surgeries. He also spearheaded the development of the Mass. Eye and Ear Cataract Master (TM), a computer-based cognitive simulation that teaches the steps and pitfalls of phaco cataract surgery in a unique way. He created an electroretinography unit in the Retina Service at Mass. Eye and Ear and more recently introduced multifocal ERG. He also worked with the Boston Retinal Implant Project to develop the surgical techniques for implantation of the retinal prosthesis and performed the first surgical procedures to place a microfabricated electrode array on the retinal surface.

Photo of John I. Loewenstein, M.D.

John I. Loewenstein, M.D.


Mass. Eye and Ear

243 Charles Street

Boston, MA 02114

T: 617-573-4274


For patient inquiries, please visit
» Clinician Profile