Cataract, Refractive & Anterior Segment Surgeon
Dr. Marneris has been voted one of America’s Best Cataract Surgeons.
Athanasios Marneris, DO, is a board-certified, fellowship-trained cataract and refractive surgeon and a defining force in MEC’s advanced cataract program. He brings surgical judgment and the discipline of an anterior segment specialist to every case. Across the combined careers of MEC physicians throughout our history, the practice’s experience includes 100,000+ ophthalmic procedures spanning cataract surgery, laser treatments and other eye procedures.
Dr. Marneris specializes in refractive cataract surgery, femtosecond laser-assisted cataract surgery, advanced-technology intraocular lenses, astigmatism correction, complex anterior segment care and minimally invasive glaucoma surgery when appropriate. He is known for translating sophisticated diagnostics into a clear, individualized surgical plan.
Advanced training · Deliberate execution
A Tinley Park native, Dr. Marneris completed his undergraduate education at Loyola University Chicago and earned his medical degree from Midwestern University. He completed his ophthalmology residency at Michigan State University, where he ranked in the top one percent nationally on the Ophthalmic Knowledge Assessment Program examination and received the Patrick Murray Award for clinical excellence.
He then completed fellowship training at the University of California, San Francisco, with advanced experience in corneal disease and uveitis. His academic work includes publications in refractive surgery and glaucoma as well as participation in clinical trials.
Built for premium cataract care
At MEC, Dr. Marneris works within a cataract program designed around comprehensive diagnostics, a full portfolio of modern lens technologies and rigorous outcomes tracking. Surgical volume has sharpened his pattern recognition; fellowship training has deepened his understanding of the anterior segment; and a measured, candid style helps patients make confident decisions about their vision.
His standard is straightforward: understand the patient’s visual priorities, choose a plan with sound clinical judgment and execute it with precision and consistency.
Outside the operating room, Dr. Marneris enjoys time with his family, music and documentary films.
Selected Research & Publications
A Retrospective Trial Comparing Prediction Accuracy of Three Biometers in Short, Medium, and Long Eyes
Clinical Ophthalmology, 2025.
