Edward Essock, PhD

Professor Emeritus

DR. ESSOCK is no longer accepting graduate school applicants.


  • B.S. University of Iowa, 1976
  • Ph.D. Brown University, 1981
  • Post-doc University of California, 1982

Research Interests

Visual Perception

  • Visual art and aesthetics
  • Perception of natural scenes
  • Encoding of natural scenes/ Cortical gain-control
  • Biases in perception of oriented stimuli (lines, edges, noise)
  • Clinical vision (e.g., Prediction of Glaucoma, Cataracts and vision)
  • Applied (Human Factors) vision

Recent Publications

  • Haun, AH, Kim, YJ, and Essock, EA (2009) An anisotropy of oriention-tuned suppression that matches the anisotropy of typical natural scenes. Journal of Vision, in press.
  • Hansen BC, Haun, AM and Essock, EA. (2008) The “Horizontal Effect”: A perceptual anisotropy in visual processing of naturalistic broadband stimuli. In Visual Cortex: New Research, T.A. Portocello and R.B. Velloti (Eds.) Nova Science Publishers, New York.
  • Zheng, Y and Essock, EA (2008) A local-coloring method for night-vision colorization utilizing image analysis and fusion. Information Fusion, 9(2), 186-199.
  • Essock, EA and Hansen, BC, and Haun, AM (2007) Perceptual bands in orientation and spatial frequency: A cortical analogue to Mach bands. Perception, 36(5), 639-649.
  • Essock, EA, Gunvant, P, Zheng, Y, Garway-Heath, DF, and Kotecha, A. (2007) Predicting visual field loss in ocular hypertensive patients using wavelet-fourier analysis of GDx scanning laser polarimetry. Optometry and Vision Science, 84(5), 380-387.
  • Gunvant, PG, Zheng, Y, Essock, EA, Parikh, RS, Prabakaran, SP, Ganesh, JG, Shekar, GC, Thomas, R. (2007) Application of shape-based analysis methods to OCT retinal nerve fiber layer. Journal of Glaucoma 16(6), 543-548.

Courses Often Taught

  • 432 Vision and Art
  • 631 Sensation and Perception
  • 633 Visual Processes
  • 331 Perception