MSPCA-Angell Headquarters

350 South Huntington Avenue, Boston, MA 02130
(617) 522-7400
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Angell Animal Medical Centers – Boston

350 South Huntington Avenue, Boston, MA 02130
(617) 522-7282
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Angell West

293 Second Avenue, Waltham, MA 02451
(781) 902-8400
For on-site assistance (check-ins and pick-ups):
(339) 970-0790
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Angell at Nashoba – Low-Cost Wellness Care

100 Littleton Road, Westford, MA 01886
(978) 577-5992
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Animal Care and Adoption Centers – Boston

350 South Huntington Avenue, Boston, MA 02130
(617) 522-5055
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Animal Care and Adoption Centers – Cape Cod

1577 Falmouth Road, Centerville, MA 02632
(508) 775-0940
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Animal Care and Adoption Centers – Nevins Farm

400 Broadway, Methuen, MA 01844
(978) 687-7453
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Meet The Ophthalmology Team

Daniel J. Biros DVM, DACVO

Dr. Biros is a board-certified ophthalmologist who identifies and treats a variety of disorders of the eye. His work involves advanced ophthalmic examination including specialized testing for cataracts, glaucoma, retinal diseases and ocular inflammation. Routine eyelid procedures and intraocular surgeries such as cataract removal are performed regularly. Dr. Biros’ special area of interest is in the characterization and treatment of ocular inflammatory disease including trauma, infection, autoimmunity and intraocular cancer.

University of Minnesota, DVM, 1996
University of Notre Dame, BS, 1992

Schepens Eye Research Institute and Department of Ophthalmology, Harvard Medical School, Postdoctoral Fellowship, 2000-2005
University of Florida, Residency in Comparative Ophthalmology, 1997-2000
Colorado State University, Internship in Small Animal Medicine and Surgery, 1996-1997

Diplomate, American College of Veterinary Ophthalmologists, 2001

Martin E. Coster, DVM, MS, DACVO

Dr. Coster is a board-certified ophthalmologist, and joined the Ophthalmology service at Angell in 2009. Dr. Coster received his veterinary degree at Colorado State University and performed advanced training in comparative veterinary ophthalmology at Purdue University. Dr. Coster performs detailed examinations and provides advanced diagnostics, medical intervention, and surgery for a wide variety of ocular diseases. These include, but are not limited to, eyelid conformational abnormalities, corneal surface disease, dry eye, glaucoma, ocular inflammation, cataracts, lens instability, and retinal disease in all companion animal species. Our team-driven approach provides an unparalleled level of care and attention to our patients. Dr. Coster’s particular special interests include cataract surgery, feline herpes virus treatment, and exotic animal ophthalmology.

Visit Dr. Coster’s Facebook page for more Ophthalmology information and tips

Purdue University, MS, Veterinary Clinical Sciences, 2009
Colorado State University, DVM, 2005
Reading University, United Kingdom, BSc (Hons), 2000
Purdue University, Residency in Comparative Veterinary Ophthalmology, 2006-2009
Purdue University, Rotating Internship in Small Animal Medicine and Surgery, 2005-2006
Diplomate, American College of Veterinary Ophthalmologists, 2009

Juanita Pires, CVT, Ophthalmology Technician

Juanita is from the small Northside of Brockton, MA where she always had a drive to work with animals. She graduated from Mount Ida College in May 2017 with an Associate’s Degree in Animal Science. She started her career as a Kennel Technician at a general practice in the area during her time in college. Juanita became a Certified Veterinary Technician in April 2019. She continued her career as a Kennel Technician until April 2018 when she joined a Specialty and Emergency as a Technician Assistant with Ophthalmology. During her time she gained a passion for Ophthalmology and Emergency. Juanita also has been a Front Store Supervisor at CVS Pharmacy for the past 8 years. She joined Angell Animal Medical Center to continue her career as an Ophthalmology Certified Veterinary Technician and plans to obtain her VTS in the near future.

During her free time she enjoys traveling and watching movies with her three guinea pigs Ruby, Apple, and Jax.

Claudia Scenna, CVT, Ophthalmology Technician

Claudia began working at Angell in November 2012 after graduating from North Shore Community College in May 2012 with a degree in Veterinary Technology.  She became Certified in August 2012.  While attending classes, Claudia was a technician assistant at Melrose Animal Clinic. Before working with animals, Claudia worked with breast cancer patients for 13 years at Massachusetts General Hospital. Her two “girls” Casey and Cooper, Lhasa Apso littermates, were her inspiration to change career fields!

Jennifer Smith, CVT, Supervisor of Specialty Technicians and Assistants

Jennifer graduated from SUNY Canton in New York in May of 2005 with an associate’s degree in animal science and become a licensed veterinary technician in August of 2005.   She worked for 5 years in a general medicine practice in Plattsburgh, NY as a veterinary technician and then accepted a job as a practice manager/veterinary technician in 2011 for a busy 4 doctor practice in the Adirondacks.  Jennifer moved to Boston in January of 2014 where she started her position here in Angell’s surgery department as an anesthesia technician. Jennifer missed the client/patient interaction so she moved to the ophthalmology department in August of 2014. In 2020, Jennifer decided to move back into a leadership role as a Supervisor of Specialty Technicians and Assistants.

When she’s not at work Jennifer enjoy outdoors activities such as hiking, kayaking, horseback riding or visiting her family and friends back in the Adirondacks.

Nikki Domenico, Client Care Coordinator, Ophthalmology

Sara Estan, Ophthalmology Secretary

Sara began volunteering at the Boston shelter in 2014 before working at an emergency veterinary hospital in Connecticut as a Kennel Technician and Emergency Receptionist. In August of 2017, Sara began her role at Angell as a Client Liaison before moving to her role as the Specialty Secretary for our Ophthalmology Service. Sara lives in Boston with her two dogs, Roman and Lana. Outside of work, her passions include the social and behavioral sciences, the study of human-animal companionship, canine enrichment, and hiking with her dogs.

If you have questions for the Ophthalmology service, would like to make an appointment, or would like to refer a client, please contact our Ophthalmology secretary Sara Estan, at 617-541-5095 or


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