Rajkumar Raveendran, PhD FAAO

Picture of Dr. Rajkumar Raveendran Contact Rajkumar.Raveendran@envisionus.com 316-440-1533 Expertise And Interests
  • Oculomotor functions such as fixational eye movements, saccades, and vergence eye movements
  • Amblyopia
  • Non-invasive brain stimulation techniques such as Transcranial Electrical Stimulation (tES) and Transcranial Magnetic Stimulation (TMS)

LCI Foundation Research Associate

Dr. Rajkumar Raveendran is an LC Industries Research Associate with the Envision Research Institute. He earned his Bachelor of Science in Optometry from Elite School of Optometry, India, and Doctor of Philosophy in Vision Science from the University of Waterloo, Canada. Dr. Raveendran’s lab (Cortical Functioning lab) focusses on developing a new rehabilitation strategy using transcranial direct current stimulation (tDCS) for people who lost central vision due to macular degeneration. tDCS is a non-invasive neuro-modulation technique where mild electrical current changes the cortical excitability. Preliminary studies at Dr. Raveendran’s lab showed that tDCS has a potential to reduce visual crowding in peripheral vision when it is applied to visual cortex. Dr. Raveendran’s research also focusses on understanding how eye movements such as fixational eye movements could influence visual crowding in the central and peripheral vision.



Dr. Raveendran's CV
Publications View All

  1. Raveendran, R. N., Chow, A., Tsang, K., Chakraborty, A., & Thompson, B. (2021). Reduction of collinear inhibition in observers with central vision loss using anodal transcranial direct current stimulation: A case series. In Brain Stimulation (Vol. 14, Issue 2, pp. 207–208). Elsevier Inc. https://doi.org/10.1016/j.brs.2020.12.015
  2. Raveendran, R. N., Tsang, K., Tiwana, D., Chow, A., & Thompson, B. (2020). Anodal transcranial direct current stimulation reduces collinear lateral inhibition in normal peripheral vision. PLOS ONE, 15(5), e0232276. https://doi.org/10.1371/journal.pone.0232276
  3. Raveendran, R. N., Krishnan, A. K., & Thompson, B. (2020). Reduced fixation stability induced by peripheral viewing does not contribute to crowding. Journal of Vision, 20(10), 3–4. https://doi.org/10.1167/jov.20.10.3
  4. Raveendran, R. N., & Krishnan, A. K. (2020). Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition. Journal of Visualized Experiments, 161, e61338. https://doi.org/10.3791/61338