Dr. Jacob Diskin

Dr. David Portney is a comprehensive ophthalmologist at Grosinger, Spigelman & Grey who specializes in cataract and refractive surgery along with the medical management of diabetic eye disease and glaucoma. Trained from undergraduate through medical school, internship, and residency at the University of Michigan—including ophthalmology residency at the Kellogg Eye Center—he brings a consistent standard of excellence and a thoughtful, patient-first approach. In the clinic and surgery center, Dr. Portney focuses on clear communication and shared decision-making. He offers modern cataract surgery with advanced lens options, evaluates candidacy for laser vision correction, and guides patients with chronic conditions such as diabetes and glaucoma using current, evidence-based care. Patients appreciate his attentive manner, practical explanations, and commitment to seamless experiences before, during, and after treatment. His goal is to ensure every visit ends with clarity and confidence about the next steps.

Dr. Matthew Pieters is a board-certified ophthalmologist at Fraser Eye Care Center who specializes in anterior segment and cataract surgery. He provides patient-centered, evidence-based care, helping people understand their options and choose personalized treatment plans that fit their visual goals and lifestyle. In addition to surgical care, he offers comprehensive ophthalmology services and partners closely with the care team to ensure a smooth experience before and after surgery. Dr. Pieters graduated summa cum laude from Washington University in St. Louis and earned his medical degree at Emory University School of Medicine. He completed an ophthalmology residency at the renowned Wills Eye Hospital and an internship at St. Francis Hospital. Originally from the Chicago suburbs, he is proud to serve patients across metro Detroit with clear communication, attention to detail, and a calm, supportive bedside manner.

Dr. Sarah Jayne Garnai is a comprehensive ophthalmologist who enjoys caring for adults with both routine and complex eye concerns. She offers thorough eye exams, helps patients navigate blurry or fluctuating vision, and tailors treatment plans for conditions such as cataracts, astigmatism, and eyelid or ocular surface disease. Dr. Garnai values clear communication and shared decision-making—she takes time to explain test results, demonstrate how medications are used, and review what to expect before and after procedures. She graduated from Harvard Medical School and completed ophthalmology residency at the University of Michigan. In clinic, her goal is simple: to help people see comfortably and confidently so they can focus on the moments that matter at work, at home, and on the road.