Dr. Leff graduated from Columbia University College of Physicians and Surgeons. He completed a medical internship at St. Luke's Roosevelt Hospital and a residency in ophthalmology at Montefiore Medical Center. Thereafter, he completed a two year fellowship in medical and surgical retina at Wills Eye Hospital in Philadelphia. He practiced in New Jersey before joining the Forest Hills Retinal Diagnostic Center.
Dr. Leff is board certified by the American Board of Ophthalmology and is a member of numerous professional societies, including the American Academy of Ophthalmology and the American Society of Retinal Specialists, and has been a clnical investigator in many retinal research trials. He has published numerous articles in the field of ophthalomogy and retina.