Research Team Research Team MORE THAN 350 CLINICAL TRIALS COMPLETED The Keystone Research Team Includes Some of the Most Experienced Investigators in the Nation THOMAS WALTERS, MD Medical Director Read Bio ROBERT MARQUIS, MD Glaucoma & Cataract Surgeon Read Bio YEN NIEMAN, MD Cornea, Cataract & Refractive Surgeon Read Bio BLYTHE MONHEIT, MD Glaucoma & Cataract Surgeon Read Bio KRISTIN SARGENT, MD Cataract Surgeon Read Bio ISAAC LOOSE, MD Retina Surgeon Read Bio CECILIA SANCHEZ, MD Retina & Diabetic Specialist Read Bio