It's Simple-All Patients, All Problems, All the Time

Clinical Staff

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Dr. J Gregory Rosenthal, MD
has been in practice in the Toledo area since 1989. He has served as Division Head of Ophthalmology at The University of Toledo Medical Center, The Toledo Hospital, and Toledo Children's Hospital. He is also on leadership committees of Prevent Blindness Ohio, CareNet, and The Sight Center of Northwest Ohio. He is the Founder and Executive Director of the Jairus Foundation, a charitable organization focused upon giving people a second chance. Through Jairus, he performs over 100 major surgeries per year in the Dominican Republic.

Dr. Rosenthal takes care of all retinal problems, regardless of nature, complexity, or the patient's ability to pay. He has special expertise in diabetic care, other complex surgical problems, and he provides the bulk of pediatric and prematurity related retinal care in the region.
Cathy Clark- Executive Director

Cathy has 20 years of experience in all aspects of ophthalmology office administration. She has successfully managed numerous practices and has lectured extensively on various business topics. She also works as the Chief Operating Officer of Systemedics, Inc., a technology and practice management services company which works very closely with Alliance Retina and other practices.
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Tammy Brinkman-
has been the Supervising Director of the Retina Service for over 15 years. She is a Certified Ophthalmic Technician and has expertise in all related technologies. She coordinates all surgical services and educational activities. Tammy also coordinates clinical research activities. She has also assisted Dr. Rosenthal in surgery in the third world and with various charitable activities.
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Kara Kessinger, COA, COPS
- is a Certified Ophthalmic Photographer and Opthalmic Technician. She has exerts in all areas of ophthalmic photography and computerized imaging systems. Kara has worked with Dr. Rosenthal for over 15 years, both as senior staff photographer and also as a scribe, surgery coordinator, and ophthalmic technician.
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Stephanie Lopez-
has over 10 years of experience as an ophthalmic technician and photographer. She and Kara work together as the most experienced ophthalmic imaging team in the region. Stephanie also performs several other vital functions for Alliance Retina and our patients.
Leslie Nachtrab
-oversees business functions in Alliance Retina offices. She works closely with Cathy Clark, our Administrator, and our billing specialist to make sure that billing, scheduling, and regulatory matters run as smoothly as possible in this ever more complex world of health care reform. This frees Dr. Rosenthal and the clinical staff to take better care of our patients and referring doctors.
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Melanie Hawkins-
has worked with Dr. Rosenthal in a previous office for several years. She also joined Alliance Retina in the spring of 2014 and has taken over the role of scheduling coordinator. This is a complex task of coordinating scheduled visits with the ever-shifting sands of surgery and emergency care. She takes care of this with calmness, efficiency, and concern first for our patients' convenience.