Physician Assistants
Medical & Surgical Expertise
Advanced Diagnostic Technology
Board-Certified Specialists
Luis Barrera P.A.
Luis D. Barrera is a nationally certified physician assistant proudly serving the Rio Grande Valley, where he was born and raised. He earned his Bachelor of Science in Biology with minors in Chemistry and Psychology from the University of Texas Rio Grande Valley, where he later completed his Master of Physician Assistant Studies, graduating in 2021.
Before transitioning into ophthalmology, Luis spent nearly three years practicing internal medicine, where he developed a strong clinical foundation and a comprehensive understanding of chronic disease management. Prior to becoming a PA, he also worked as a medical scribe and at a veterinary hospital–experiences that helped shape his commitment to compassionate, detail-oriented care.
Luis is passionate about protecting and preserving vision. He values the precision and evolving technology of ophthalmology and enjoys building strong relationships with his patients while helping them better understand their eye health.
Outside of work, Luis enjoys cooking, baking, and exploring his love for music. He also treasures time spent with his two Shih Tzus, Onix and Cubone, who bring joy and balance to his life.
Craig Comisky P.A.
Craig Comisky who specializes in conducting comprehensive eye exams to assess vision and eye health. He is adept at diagnosing and treating common eye conditions, such as cataracts and glaucoma.
Born in Michigan in 1959, Craig moved to North Carolina at a young age and later to Port Arthur, Texas in 1969. He graduated from Nederland High School in Nederland, Texas in 1977. Before embarking on his medical journey, Craig spent the first half of his life working in the labor and oil refinery industry as a union hand in the Longshoreman’s, IUPAT (industrial coatings, sandblasting, and painting), and Boilermakers/Ironworkers unions.
In 1995, Craig decided to return to school, graduating from Lamar University, Beaumont, Texas with a BSMT as a Clinical Laboratory Scientist in 2000. His thirst for knowledge led him to the University of Texas-Pan American (UTPA), where he earned a Bachelor of Science in Physician Assistant Studies in 2004 and a Master’s in the same field in 2008.
Upon graduation in 2004, Craig began working in Rural Health Medicine in Rio Hondo, Texas. Within six years, he shifted his focus to Pediatric Medicine, practicing first in Brownsville, Texas, and then in Los Fresnos, Texas. In 2024, Craig decided to specialize in the field of Ophthalmology.
Craig’s dedication to his profession was recognized when he graduated Magna cum laude from UTPA in 2004 and received the Humanitarian Award from the UTPA physician assistant program the same year.
Craig is a family man and has been married for 22 years, has 3 wonderful children, and a granddaughter. When he’s not improving the vision and eye health of his patients, Craig enjoys playing golf, fishing, and tinkering with gadgets. His diverse background and commitment to lifelong learning make him a valuable asset to our team.
Gary Hamilton P.A.
Gary Hamilton is a dedicated and compassionate Physician Assistant with a strong commitment to serving the Rio Grande Valley community. Born in England, Gary moved to the Rio Grande Valley at just four years old, where he was raised and developed a deep connection to the area he now serves.
He completed his undergraduate studies in San Antonio at Our Lady of the Lake University, where he earned a degree in Biology with a minor in Chemistry. He then went on to graduate from the UTRGV Physician Assistant Program. Gary began his medical career with one year in pediatric care, followed by four years in hospital medicine with a focus on pulmonology, and an additional two years in urgent care. These diverse experiences have equipped him with a broad clinical skill set and a patient-centered approach to care.
Gary has developed a growing interest in ophthalmology, driven by his desire to help address the shortage of specialty providers in the underserved Rio Grande Valley. He welcomes the challenge of expanding his expertise while improving access to quality care in his community.
Outside of medicine, Gary enjoys staying active through sports and spending time outdoors. He values quality time with his wife, son, and their three dogs. He also enjoys singing and finds it to be a fun way to relax and unwind.
Barbara Montoya P.A.
Barbara Montoya is a native of Laredo and received her Bachelor’s degree in Biology from Texas A&M International University. Barbara went on to earn her Master of Physician Assistant Studies degree from the University of Texas Medical Branch in Galveston. Additionally, she earned her Texas esthetician license after completing the esthetics program at Paul Mitchell cosmetology school in San Antonio.
Barbara is a Nationally Certified Physician Assistant and is licensed in the state of Texas. Currently, she practices within the field of ophthalmology. Barbara has a special interest in ocular disease management and aesthetic medicine. She has completed additional training in the practices of botulinum toxin and cosmetic lasers. Barbara is devoted to her community and looks forward to treating patients of Laredo and surrounding areas.
Barbara resides in Laredo with her two lovely cats, Clementine and Abner. On her free time, Barbara enjoys working out, watching movies, and spending time with friends and family.
Andrea Sacramento P.A.-C
Andrea Sacramento, PA-C is a South Texas Native. She grew up in Brownsville and Matamoros, bringing a deep understanding of the South Texas community. Her bilingual fluency in Spanish enhances her ability to connect with patients. Her dedication and compassion ensure each of her patients receive the best care possible.
Ms. Sacramento earned her Bachelor of Science in Health Education from Texas A&M University and her Master of Physician Assistant Studies from UTRGV. During her studies, she was introduced to ophthalmology in San Antonio during her capstone clinical rotation and discovered her passion. Her focus includes performing intravitreal injections and managing retinal conditions, where she combines precision and empathy to deliver high-quality care, utilizing the latest technologies.
Outside of the clinic, Andrea enjoys unwinding with the latest reality drama shows and discovering hidden gem restaurants throughout the Rio Grande Valley.
Check out what patients say
I had a wonderful experience with Dr. Sanjeeb Bhandari. He is a soft-spoken gentleman who immediately put me at ease, even after explaining that I would need monthly injections in my left eye to protect my vision. His calm, reassuring manner helped take away my fear, and I truly felt cared for throughout the visit. I’m grateful to be in such capable, compassionate hands and highly recommend him and the Gulf Coast Eye Institute.
I enjoy seeing Dr. Cantu he is kind & explains everything to you with patience & not rushed. I just realized he walks you out of the office to the reception area. Never have I had that curiosity extended me as a patient. The staff thrughout the entire office settings including the front office staff are nice & helpful. Although they are very busy they take the time to greet you.
Dr. Tawfik has been treating my glaucoma. I showed up 20 minutes before they closed without an appointment because my optometrist (from another office) noticed my eye pressure was elevated and said it was urgent to be evaluated and treated. Despite showing up last minute, Dr Tawfik saw me within minutes of arriving. He truly cares and takes great care of his patients. I highly recommend this clinic!
Trusted Eye Care Across the Rio Grande Valley
From routine eye exams to advanced surgical care, our experienced team is here to help you protect and improve your vision at every stage of life. With multiple convenient locations throughout the Rio Grande Valley, quality eye care is always close to home.
