Hartwick_Andrew_460x460Associate Professor, College of Optometry
Faculty Affiliate, Chronic Brain Injury

Department of Neuroscience
College of Medicine

The Ohio State University
College of Optometry
338 W. 10th Ave.
Columbus, OH 43210

Research Interests

A major focus of current research in Dr. Hartwick’s lab is understanding how a subset of ganglion cells are able to capture light and convert it into an electrical signal. These cells express melanopsin photopigment and are termed intrinsically photoreceptive retinal ganglion cells (ipRGCs). In addition to their electrophysiology, their contribution to the human pupillary light reflex is a major topic of study in the lab. Recent clinical-based research has examined how ipRGC photoreception is affected in patients with glaucoma and traumatic brain injury.

Research Techniques

  • Cell culture
  • Calcium imaging
  • Multi-electrode array electrophysiology
  • Immunohistochemistry
  • Tonometry
  • Pupil recordings
  • Clinical-based research


OD: Optometry, University of Waterloo, Ontario
MS: Vision science, University of Waterloo, Ontario
PhD: Anatomy, Dalhousie University