Dr. Kathryn Lewis

Ophthalmology

Anaheim, CA

Kathryn Lewis, MD, is a board-certified comprehensive ophthalmologist serving patients at Acuity Eye Group in Orange County. She offers thoughtful, approachable care for routine and complex eye problems, with particular expertise in cataract surgery and the medical management of chronic conditions like dry eye, glaucoma, and diabetic retinopathy. Dr. Lewis is known for her attentive listening and clear explanations, helping each patient understand options and feel confident in their plan. Dr. Lewis graduated with honors from UC San Diego and earned her medical degree from UC Riverside School of Medicine. She completed ophthalmology residency at UT Health San Antonio, where she gained extensive experience in complex cataract procedures, upper eyelid surgery, emergency ocular care, and a range of laser and injection treatments. Today, she brings that broad skill set to individualized, evidence-based care focused on safety, comfort, and lasting visual outcomes.

Dr. Giovanni Greaves

Ophthalmology

Los Angeles, CA

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. Changyow Kwan

Ophthalmology

Irvine, CA

Dr. Changyow C. Kwan is an ophthalmologist with fellowship training in glaucoma who provides comprehensive eye care for adults. She sees patients through Optic Eye Care and Huntington Hospital, offering evaluation and ongoing management for common and complex eye conditions, with a particular focus on diseases that affect the optic nerve and eye pressure. Dr. Kwan earned her medical degree from the Feinberg School of Medicine, then completed a transitional internship at Ascension Resurrection Hospital. She went on to ophthalmology residency at UC Irvine Medical Center, followed by a glaucoma fellowship at UC Irvine. This training equipped her with expertise in medical, laser, and surgical options for glaucoma as well as cataract care in patients with coexisting disease. Dr. Kwan is known for a thoughtful, detail-oriented approach. She takes time to explain test results and treatment choices so patients can participate actively in protecting their vision.