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Prem S. Subramanian, MD PhD

Prem Sagar Subramanian, MD PhD
Associate Professor of Ophthalmology
Appointment Phone


Primary Location

The Johns Hopkins Hospital

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Out-of-State & International Patients +
Out of State Patients

Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

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International Patients

Call +1-410-502-0773 (7a.m. to 6p.m., EST, Mon-Fri)

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  • Associate Professor of Ophthalmology
  • Associate Professor of Neurological Surgery
  • Associate Professor of Neurology

Centers & Institutes

  • Multiple Sclerosis Center
  • Neurofibromatosis Center
  • Normal Pressure Hydrocephalus Center
  • Pituitary Center
  • Wilmer Eye Institute


Cranial Nerve Palsies, Intracranial Hypertension, Multiple Sclerosis, Ophthalmology, Optic Nerve Disease, Orbital Tumors, Pseudotumor Cerebri, Skull Base Tumors, Strabismus, Thyroid Eye Disease, Venous Sinus Stenosis

Research Interests

Effects of diplopia on quality of life; Traumatic brain injury; Optic Nerve Regeneration


Prem S. Subramanian, M.D., Ph.D., is an associate professor of ophthalmology, neurology and neurosurgery at the Wilmer Eye Institute, chief of the neuro-ophthalmology division and director of the Thyroid Eye Disease Center at Wilmer's Bethesda office. He specializes in neuro-ophthalmology, with special interest in the treatment of thyroid eye disease, disorders that cause double vision in adults and orbital and skull base tumors. His clinical practice includes patients with all types of disorders of the optic nerve and orbit. Dr. Subramanian is the principal investigator in clinical trials on treatments for thyroid eye disease and idiopathic intracranial hypertension and is conducting research on how to treat vision problems in patients with traumatic brain injury. He performs surgery for tumors of the orbit, thyroid exophthalmos, and strabismus.

Dr. Subramanian received his M.D. and Ph.D. (in molecular and human genetics) degrees from Baylor College of Medicine. He completed an internship and ophthalmology residency at Walter Reed Army Medical Center and then completed a fellowship in neuro-ophthalmology at the Wilmer Eye Institute. Dr. Subramanian served as director of neuro-ophthalmology at Walter Reed for four years before joining the Wilmer faculty in 2007.


  • English
  • Tamil
  • German
  • Spanish


American Academy of Ophthalmology
North American Neuro-ophthalmology Society
Sigma Xi

Clinical Trial Keywords

  • Pseudotumor cerebri (idiopathic intracranial hypertension)
  • Optic neuritis

Additional Resources

Additional Resources +
  • Education +


    • Baylor College of Medicine ( Houston TX ) (1997)


    • Walter Reed Army Medical Center/Ophthalmology ( Washington DC ) (2001)


    • Johns Hopkins University School of Medicine/Neuro - ophthalmology ( Baltimore MD ) (2003)


    • Ophthalmology, American Board of Ophthalmology (2013)
  • Research & Publications +
  • Academic Affiliations & Courses +
  • Activities & Honors +
  • Videos & Media +


    Meet Dr. Subramanian

    Dr. Prem Subramanian is an ophthalmologist specializing in neuro-ophthalmology, including thyroid eye disease, disorders that cause double vision in adults, and orbital and skull base tumors. Visit

  • Upcoming Events +
  • Contact & Locations +


    The Johns Hopkins Hospital
    600 N. Wolfe Street
    Wilmer Room 233
    Baltimore, MD 21287
    Phone: 410-955-8679
    Appointment Phone: 410-955-8679
    Fax: 410-614-9240
    Location Map
    Johns Hopkins Wilmer Eye Institute - Bethesda
    7315 Wisconsin Ave.
    West Tower, Suite 610
    Bethesda, MD 20814
    Phone: 240-482-1100
    Appointment Phone: 240-482-1100
    Fax: 240-482-1105


    • Ophthalmology - Neuro-Ophthalmology

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