Dr. Kathryn Lewis

Dr. Dagny Zhu is a fellowship-trained ophthalmologist specializing in cornea, refractive, and cataract surgery. She offers laser vision correction and advanced lens options, including EVO Implantable Contact Lens (ICL) and custom lens replacement, and she performs corneal transplantation and other anterior-segment procedures to restore and protect vision. A Southern California native, Dr. Zhu earned her undergraduate degree at UCLA and her medical degree at Harvard Medical School, where she conducted research in corneal immunology at Massachusetts Eye and Ear. She completed ophthalmology residency at the Doheny Eye Institute/University of Southern California (USC) & Los Angeles County Medical Center and advanced fellowship training in cornea and refractive surgery at Bascom Palmer Eye Institute. Dr. Zhu serves as Medical Director and Partner of NVISION Eye Centers and holds a clinical faculty appointment at Western University. Fluent in Mandarin, Shanghainese, and Spanish, she focuses on clear communication and individualized surgical planning so patients feel informed and confident about their options.

Dr. Giovanni H. Greaves is a board-certified, fellowship-trained ophthalmologist specializing in cataract surgery and medical retina. He cares for a wide range of retinal conditions—including age-related macular degeneration, diabetic retinopathy, retinal vein occlusions, vitreous floaters, and inherited retinal diseases—and also performs pterygium excision. Dr. Greaves is known for communicating clearly about diagnosis and options, and for tailoring treatment plans that balance vision, safety, and lifestyle. He earned his medical degree from the Perelman School of Medicine at the University of Pennsylvania, completed ophthalmology residency at Northwell Health (formerly North Shore–LIJ) where he served as chief resident, and pursued a medical retina fellowship at UCLA through the Jules Stein and Doheny Eye Institutes. From preventive care to ongoing injection therapy and surgical management when needed, Dr. Greaves partners closely with patients to preserve sight and quality of life.

Dr. Marib Akanda is an ophthalmologist with advanced training in retinal disease and uveitis. He provides comprehensive medical and surgical care for conditions that threaten the macula and peripheral retina, and explains each step—from imaging to injections or surgery—so patients know what to expect. His approach emphasizes timely treatment, careful follow-up, and coordination with primary eye care to safeguard vision. Dr. Akanda completed an ophthalmology residency at Northwell Health, followed by a uveitis fellowship at Northwell and vitreoretinal disease and surgery fellowship training at Loma Linda University Health. He also earned his medical degree from SUNY Downstate. He enjoys teaching and welcomes questions, believing that informed patients make the best decisions for their eyesight.