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. Ahmad Al Moujahed

Ophthalmology

Stanford, CA

Ahmad Al-Moujahed, MD, PhD, MPH, is a retina specialist with additional expertise in inherited retinal degenerations (IRDs). He provides medical and surgical care for retinal and macular disease and offers thoughtful counseling about diagnostics, treatment options, and participation in appropriate clinical trials for IRDs. Patients value his clear explanations and the time he spends aligning care with each person’s visual goals. Dr. Al-Moujahed completed ophthalmology residency at Stanford University, followed by vitreoretinal surgery and IRD fellowships at Harvard’s Massachusetts Eye and Ear. He also completed a retina research fellowship at Massachusetts Eye and Ear and holds a PhD from Boston University and an MPH from Northeastern University. His clinical and research focus includes retinal and macular diseases, IRDs, and vitreoretinal surgery.

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.