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John J. Weiter,M.D., Boston, MA

Meet Dr. Weiter: Expert in Vitreo-Retinal Surgery and Ophthalmic Pathology

Dr. John J. Weiter is a Board Certified Ophthalmologist specializing in vitreoretinal surgery and ophthalmic pathology.


Dr. Weiter specializes in diabetic retinopathy, macular degeneration, retinal detachment surgery, vitreous surgery, diagnostic retinal disease, and retinal inflammatory disease.

Education and Training

Dr. Weiter earned both a Medical degree and a Ph.D. from the University of Chicago. His residency and vitreoretinal fellowship were also completed at the University of Chicago, while his ophthalmic pathology fellowship took place at the Armed Forces Institute of Pathology.

With a rich professional background, Dr. Weiter has served as the past director of research at the National Naval Medical Research Institute and the Schepens Eye Research Institute (Harvard Eye Research Institute). He has held positions as Director of the Retina Service at Tufts University and Director of Ophthalmology at the Veterans Administration Hospital (Jamaica Plain). Additionally, Dr. Weiter has contributed significantly to the field as a past president of the Massachusetts Society of Eye Physicians and Surgeons and as a member of various prestigious organizations including the Macular Society, Vitreo-retinal Society, and the American Academy of Surgery.


Dr. Weiter serves as an Associate Clinical Professor at Harvard Medical School, and he is affiliated with the American Academy of Ophthalmology and the Retina Society. As a senior surgeon at Massachusetts Eye and Ear Infirmary and a senior scientist at the Schepens Research Institute, he brings extensive expertise to his practice.

Additionally, Dr. Weiter has directed a vitreoretinal fellowship training program and has authored numerous clinical and research papers, as well as books and book chapters, contributing significantly to the field.

Schedule your consultation today with Dr. Weiter!

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Real patients. Real reviews.

Emily Dematrest

“My experience with Nielsen Eye Center was so exceptional. The staff at NEC are amazingly patient-centered and it was one of the nicest (and certainly the easiest) medical experiences I have ever had. And now I have perfect vision! It is just fantastic to wake up and be able to see perfectly. No matter what activities my day includes, yoga, cycling, or surfing – I never have to worry about contacts or glasses. One less excuse for working out and one less barrier to staying active!”

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Former New England Patriot, Tony Simmons

“LASIK surgery has helped me greatly–both on and off the football field. It has given me an advantage of seeing the football more clearly and sharper than ever before. I never have to worry about contacts popping out, solutions or cleansers. Every morning I wake up and see the clock clearly. Thanks to Dr. Nielsen I see better than ever. My life has improved with my sight.”

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Alex Guerrero

“I have always had perfect vision. In my 40s I started to lose the ability to focus, both up close and far away. I had been wearing glasses full-time for about 5 years when I met Dr. Nielsen.

The decision to have LASIK surgery was hard because I was concerned it might not end up well. I had many friends whose results were less than stellar. But what an amazing experience! Everyone at the Nielsen Eye Center was wonderful! My experience from start to finish was above and beyond my expectations. Distance vision was my biggest issue because when I work with my clients, I am very active and my glasses got in the way.

I decided to just have a correction done for distance, so I only need reading glasses now. I would recommend anyone considering LASIK surgery to only have Dr. Nielsen do it. He is the best!”

TB12: Co-Founder

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Ken Casey

“Holy Crap I can see! In and out, just like that. It’s so nice to actually see the faces of the people we are performing in front of, and I have the Nielsen Eye Center to thank for that.”

Dropkick Murphys

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Loren Owens

“Since age six I’ve worn glasses and contact lenses. I was the guy who couldn’t see the “Big E” on the chart. Finally, I heard about PRK about 10 years ago. I immediately investigated only to be disappointed to learn that my vision was well beyond the possibility of correction through PRK. When LASIK was approved, I was ready in a heartbeat…and couldn’t be happier with the results. I see clearly….no need for contacts or lenses and wholeheartedly endorse and recommend the procedure to all my friends and associates. For me, the entire process has been a dream come true.”

WROR Radion Station 105.7, Boston MA

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Glen Ordway

“My wife, Sarah, and I would like to express our gratitude for changing our lives through the LASIK and CK laser eye surgeries! This letter is long over due (only because without glasses, I’ve been having the time of my life!) I have to admit; at first, I was very uncomfortable with the idea of eye surgery. While I thought it was an amazing concept, thinking about all the “what ifs” was nerve-wracking. You and your amazing staff made our experiences comfortable, informative, and literally, life-altering.

Sarah underwent the LASIK procedure before me and was so impressed with your staff and your level of care and professionalism. Her experience was flawless. My experience followed suit. Moreover, we now have an incredible vision! Sarah and I continue to recommend your practice to anyone interested in the LASIK or CK procedures.

And, thank you for your support with out charitable endeavors. We truly appreciate your kindness.”

Sports Radio 850 WEEI

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PJ Antonik

“For 22 years I struggled with contacts… The day I decided to get LASIK was a big day and it turned out to be one of the best decisions I ever made! Thank you Dr. Morerira of Nielsen Eye Center for giving me perfect vision with no contacts!”

CEO of Oak Development & Design, Host of ‘Heart of Oak’ on NESN

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