Our Providers

Linus Sun, MD, PhD
  • Instructor in Neurology (in Ophthalmology)
Linus Sun, <span>MD, PhD</span>

Dr. Linus D. Sun is an physician-scientist who specializes in the Neurology and neuroscience of eye movements. He received his MD from Yale University School of Medicine, a PhD from MIT, and completed a residency in Neurology and fellowship in Neuro-Ophthalmology at CUMC.

Dr. Sun's specialty is in Neuro-Ophthalmology and his clinical focus is on the diagnosing of disorders of the oculomotor nervous system and to investigate their treatments. He participates in clinical trials that require neuro-ophthalmological evaluation. 

Example eye movement disorders include: abnormally slow or fast quick eye movements (saccades), that over or undershoot targets (dysmetria), unsteady smooth pursuit, unstable fixation (nystagmus and saccadic intrusions), and double vision (convergence or divergence insufficiency). Clinical conditions for which eye movement disorders are present include: concussion, ocular myasthenia gravis, progressive supra-nuclear palsy (PSP), Parkinson's disease, posterior cortical atrophy, other dementias, chronic progressive external ophthalmoplegias, multiple sclerosis, vestibular neuronitis, cerebellar disorders, and stroke to name a few. 

Linus D. Sun, MD, PhD, manages both basic science and translational research laboratories. Utilizing a monkey model, his lab’s basic science mission is to decode the brain’s eye position signal and how it manifests in human disease. Dr. Sun made the discovery that cortical ocular proprioception is a fundamental brain signal that stabilizes ocular orientation and eye position coding in other parts of the brain. Recently his lab discovered that ocular proprioception is crucial in forming visual spatial memories as well as having a role in the development of intermittent exotropia (strabismus). His clinical mission is to evaluate and treat patients that develop eye movement disorders such as lazy eye, diplopia (double vision), convergence insufficiency, and progressive supranuclear palsy. These syndromes manifest in patients with neurodegenerative disease, stroke, multiple sclerosis, myasthenia gravis, and traumatic brain injury. By quantifying the psychophysics of eye movements, Dr. Sun’s laboratory utilizes oculomotor physiology as a biomarker for assessing outcomes of treatments of novel pharmaceuticals and visuo-motor rehabilitation strategies.

Dr. Sun is a nationally recognized physician-scientist whose active research programs that studies disorders and treatments of the visual nervous system.

Dr. Sun completed his undergraduate training and research with honors in Molecular Biology at UC Berkeley. He received his PhD at Massachusetts Institutes of Technology where he studied the molecular basis and neurophysiology of learning and memory. After his medical training and internship at Yale University School of Medicine he completed a residency in Neurology at Columbia University Medical Center (CUMC) and was the first recipient for his department of a competitive National Institutes of Health (NIH) research fellowship for an investigation in visual neuroscience. Dr. Sun joined the department of Ophthalmology as the principle investigator of a competitive NIH funded research grant investigating the neurological basis on how the brain processes visual information and eye movements, mentored by Dr. Michael E. Goldberg (Professor at CUMC, Society for Neuroscience President Alumnus, and member of the National Academy of Science).

Board Certifications

  • Neurology

Areas of Expertise

  • Convergence Insufficiency
  • Divergence Insufficiency
  • Neuro-Ophthalmology
  • Double Vision/Diplopia
  • Neurology
  • Eye Movement Disorders
  • Nystagmus

    Education & Training

  • PhD, Massachusetts Institute of Technology
  • MD, Yale University School of Medicine
  • Internship: Yale-New Haven Hospital
  • Residency: NewYork-Presbyterian Hospital/Columbia University Medical Center


  • Edward S. Harkness Eye Institute

    635 West 165th Street
    Floor: 5th Floor
    New York, NY 10032
    (212) 305-9535
    For new and current patient appointments, call:
    (212) 305-9535

Provider Affiliations

  • NewYork-Presbyterian/Columbia

Insurance Programs

Please contact the provider's office directly to verify that your particular insurance is accepted.

  • Aetna [EPO, HMO, Medicare Managed Care, NY Signature, NYP Employee Plan, POS, PPO, Signature Administrators, Student Health]
  • AgeWell [Medicare Managed Care, Special Needs Plan]
  • Capital District Physician Health Plan [Capital District Physician Health Plan]
  • Cigna [EPO, Great West, HMO, POS, PPO]
  • Emblem/GHI [Medicare Managed Care, PPO]
  • Emblem/HIP [ConnectiCare, EPO, Essential Plan, HMO, Medicaid Managed Care, Medicare Managed Care, POS, PPO, Select Care (Exchange), Vytra]
  • Empire Blue Cross Blue Shield [EPO, Medicare Managed Care, PPO]
  • Local 1199 [Local 1199]
  • MagnaCare [MagnaCare]
  • Multiplan [Multiplan]
  • MVP Health Care [Child/Family Health Plus, Essential Plan, HMO, Medicaid Managed Care]
  • Oxford Health Plans [Freedom, Liberty]
  • UnitedHealthcare [Columbia University Employee Plan, Compass (Exchange), HMO, Medicaid (Community Plan), Medicare Managed Care, POS, PPO]

This provider accepts new patients

Appointment Phone Number: (212) 305-9535

NIH Grants


    Jan 4 1993 - Dec 31 2018


    Apr 1 2013 - Mar 31 2018


    Aug 1 2009 - Jul 31 2015


    Mar 15 2010 - Jun 30 2015