Trefford Simpson

Trefford Simpson did his optometric training in Johannesburg, South Africa, graduate training at the University of Houston and a post-doctoral fellowship at the University of Toronto. He has been at the University of Waterloo since 1994 and is currently a professor emeritus and adjunct professor at the School of Optometry and Vision Science.

• Soft Metrology, psychophysical measurement of ocular surface pain and thermal sensing, scaling symptoms and visual function, ocular surface imaging (particularly OCT), ocular surface structure and function, binocular vision

• Clinical Imaging

• Vision Rehabilitation

• Ocular Biology

• Vision Services

• Dip Optom (Wits Technikon), MSc (Houston), PhD (Houston)

• OPTOM 109 - Visual Perception 1: Perception of Light
  • Taught in 2021
• OPTOM 152 - Clinical Techniques 1
  • Taught in 2021, 2023, 2024
• OPTOM 243 - Neurophysiology of Vision
  • Taught in 2020, 2021
• OPTOM 252 - Clinical Techniques 2
  • Taught in 2023
• OPTOM 360 - Professional Ethics and Optometric Communication
  • Taught in 2023, 2024
• OPTOM 650 - Research Methodology for Vision Science
  • Taught in 2020, 2023
• OPTOM 651 - Data Analysis in Vision Science
  • Taught in 2021, 2024

* Only courses taught in the past 5 years are displayed.

• Jayakumar V., and Simpson T., Multiple Criterion and Multiple Stimulus Signal Detection Theory Analysis of Corneal Painful and Cool Pneumatic Stimuli, Frontiers in Pharmacology, Volume 13, Canada, 2022.

• Alabi E.B., Simpson T.L., Harris T., and Whitten K., Determining the spectral transmittance of photochromic contact lenses, Contact Lens and Anterior Eye, Volume 44, United States, 2021.

• Simpson T., Begley C.G., Situ P., Feng Y., Nelson J.D., Caffery B., Springs C., and Connell S.B., Canonical grading scales of corneal and conjunctival staining based on psychophysical and physical attributes, Translational Vision Science and Technology, Volume 10, Canada, 2021.

• Alabi E.B., and Simpson T.L., Accommodative response to ocular surface pain, Clinical and Experimental Optometry, Volume 105, 624-630, Canada, 2022.

• Situ P., Simpson T.L., Begley C.G., and Keir N., Role of diurnal variation of corneal sensory processing in contact lens discomfort, Ocular Surface, Volume 18, 770-776, United States, 2020.

• Jayakumar V., and Simpson T.L., Detectability and bias indices of pneumatic corneal stimuli using signal detection theory, Translational Vision Science and Technology, Volume 9, 1-16, Canada, 2020.

• Alabi E.B., and Simpson T.L., Pupil response to noxious corneal stimulation, Plos One, Volume 15, Canada, 2020.

• Awisi-Gyau D., Begley C.G., Situ P., and Simpson T.L., Changes in corneal detection thresholds after repeated tear film instability, Investigative Ophthalmology and Visual Science, Volume 60, 4234-4240, United States, 2019.

• Jayakumar V., and Simpson T.L., A method to calibrate the carbon dioxide (Chemical) stimuli of pneumatic esthesiometer externally, Translational Vision Science and Technology, Volume 8, Canada, 2019.

• Situ P., Begley C.G., and Simpson T.L., Effects of tear film instability on sensory responses to corneal cold, mechanical, and chemical stimuli, Investigative Ophthalmology and Visual Science, Volume 60, 2935-2941, United States, 2019.