Tom Cornsweet

Tom N. Cornsweet
Born (1929-04-29)April 29, 1929
Cleveland, Ohio
Nationality American
Fields Ophthalmology, psychology
Institutions Yale University (1955–1959), University of California, Berkeley, Stanford Research Institute, Stanford University, Baylor College of Medicine, University of California, Irvine, Brien Holden Vision Diagnostics
Alma mater Cornell University, Brown University
Known for Cornsweet illusion

Tom N. Cornsweet (born April 29, 1929, in Cleveland, Ohio)[1] is an American experimental psychologist, author, inventor and entrepreneur known for his pioneering work in visual perception,[2] especially the effect that bears his name, and in the development of ophthalmic instrumentation.[3]

Academic background and scientific research

Cornsweet is known for documenting the effect that bears his name in the 1960s.[2][4] Prior to his work on this particular optical illusion, Cornsweet graduated from Cornell University and enrolled in a graduate program at Brown University, operating in the vision research laboratory of Lorrin A. Riggs.[5][6] During his graduate studies he was co-author of an early paper describing stabilized images.[5] His 1955 Ph.D. dissertation in experimental psychology involved small movements of the eye. Cornsweet was an assistant professor at Yale University from 1955–1959, and then became professor of psychology at the University of California, Berkeley. His interest in psychophysics led him to develop an widely employed improvement in the staircase method.[7] As an outgrowth of the courses he taught, Cornsweet published a frequently-cited textbook.[8]

Inventor and entrepreneur

In the late 1960s and early 1970s, Cornsweet was a key member of the Bioinformation Systems Group at the Stanford Research Institute (SRI). While also teaching in the psychology department at Stanford University, he designed or co-designed several innovative instruments for measuring properties of the eye, including eyetrackers,[9] auto-refractors,[10] and optical fundus scanners.[11] He left SRI to become Chief Scientist at Acuity Systems, where he developed the first commercial auto-refractor in 1973. During this time, Cornsweet continued to invent devices for measuring various properties of the eye and also to teach, first at the Baylor College of Medicine and later at the University of California, Irvine.[12] He served as Vice President of research and development for Sensory Technologies from 1994 to 1997. In 1999 Cornsweet retired from UC–Irvine and co-founded Visual Pathways, where his team developed an automated retinal imaging system intended for the diagnoses of glaucoma, cataracts, diabetic retinopathy and macular degeneration. Visual Pathways folded after several years after shipping only 24 devices.

Cornsweet is currently (2011) Professor of Cognitive Science, Electrical and Computer Engineering, and Ophthalmology, Emeritus, University of California, Irvine. From 2013 to 2015, he was Chief Scientist at Brien Holden Vision Diagnostics (formerly Quantum Catch),[13] a company developing low-cost ophthalmic instruments for detection and monitoring of disease. He was dismissed in September 2015 and currently resides in Prescott, AZ with his wife.

Patents and awards

Publications

Cornsweet has written three books and published more than 100 journal articles.[16]

Books
Journal articles
  • L.A. Riggs, F. Ratliff, J.C. Cornsweet and T.N. Cornsweet. "The disappearance of steadily fixated test objects". Journal of the Optical Society of America, 43, 495–501. (1953)
  • E.P. Johnson and T.N. Cornsweet. "Electroretinal photopic sensitivity curves". Nature, 174, 614 (1954)
  • T.N. Cornsweet. "Determination of the stimuli for involuntary drifts and saccadic eye movements". Journal of the Optical Society of America, 46, 987–993. (1956)
  • T.N. Cornsweet. PhD Thesis Publication No. 13, 163. University Microfilms, Library of Congress #MICA 55-1914.
  • L. Stark and T.N. Cornsweet. "Testing a servoanalytic hypothesis for pupil oscillations". Science, 127, 588. (1958)
  • T.N. Cornsweet, H. Fowler, R.G. Rabedeau, R.E. Whalen, and D.R. Williams. "Changes in the perceived color of very bright stimuli". Science, 128, 898–899. (1958)
  • T.N. Cornsweet. "New technique for the measurement of small eye movements". Journal of the Optical Society of America. 48, 808–811. (1958)
  • J. Krauskopf, T.N. Cornsweet, and L.A. Riggs. "Analysis of eye movements during monocular and bionocular fixation". Journal of the Optical Society of America, 50, 572–578. (1960)
  • T.N. Cornsweet. "The staircase method in psychophysics". Am.J.Psychol., 75, 485–491.(1962)
  • T.N. Cornsweet. "A stabilized image requiring no attachments to the eye". Am.J.Psychol., 75, 653–656. (1962)
  • T.N. Cornsweet. "Changes in the appearance of stimuli of very high luminance". Psychol. Rev., 69, 257–273. (1962)
  • T.N. Cornsweet. "Measuring movements of the retinal image with respect to the retina". In: Biomedical Sciences Instrumentation, Volume 2, Plenum Press. (1964)
  • T.N. Cornsweet and H. Pinsker. "Luminance discrimination of brief flashes". J.Physiol., 176, 294–310. (1964)
  • T.N. Cornsweet and D.Y. Teller. "Relation of increment thresholds to brightness and luminance". Journal of the Optical Society of America, 55, 1,303–1,308. (1965)
  • T.N. Cornsweet. Stabilized image techniques. National Academy of Sciences Symposium, “Recent developments in vision research.” (1966)
  • T.N. Cornsweet and H.D. Crane. "Servo-controlled infrared optometer". Journal of the Optical Society of America, 60, 577. (1970)
  • H.D. Crane and T.N. Cornsweet. "Ocular focus stimulator". Journal of the Optical Society of America, 60, 577. (1970)
  • T.N. Cornsweet and H.D. Crane. "Training the visual accommodation system". Vision Research, 13, 713. (1973)
  • T.N. Cornsweet and H.D. Crane. Accurate two-dimensional eye tracker using first and fourth Purkinje images. Journal of the Optical Society of America, 63, 921–929. (1973)
  • T.N. Cornsweet. The Purkinje-image method of recording eye position. In: Eye movements and psychological processes, Monty and Senders, eds., Lawrence Earlbaum Associates, Inc. (1976)
  • T.N. Cornsweet. The Bezold-Brucke effect and its complement, hue constancy. In: Visual Psychophysics: The physiological foundations. Academic Press. (1978)
  • T.N. Cornsweet, S. Hersh, R. Beesmer, and D. Cornsweet. Quantification of the shape and color of the optic nerve head. In: Advances in diagnostic visual optics. Breinin and Siegal, eds, Springer-Verlag. (1983)
  • T.N. Cornsweet. Image processing in the retina. Journal of the Optical Society of America., 73, 1944. (abstract). (1983)
  • F.S. Mikelberg, G.R. Douglass, M. Schilzer, T.N. Cornsweet, and K. Wigsman. "Reliability of optic disk topographical measurements recorded by the Rodenstock Video-Optograph". Amer.J.Ophthal. (1984)
  • J.I. Yellott, B.A. Wandell, and T. N. Cornsweet. The beginnings of visual perception. In: Handbook of Physiology, Vol. III, The nervous system. Darian Smith, ed. The American Physiological Society. (1984)
  • T.N. Cornsweet. "A simple retinal mechanism that has profound effects on perception". J.Physiol.Optics and Optom., 62, 427. (1985)
  • T.N. Cornsweet and J.I. Yellott. "Intensity-dependent spatial summation". Journal of the Optical Society of America, 2, 1,769–1,786. (1985)
  • T.N. Cornsweet. Understanding the swinging flashlight test. In: Non-invasive assessment of the visual system, Volume 1, Optical Society of America Technical Digest series. (1993)

List of publications adapted from Cornsweet's curriculum vitae, published by the University of California, Berkeley.[18]

References

  1. ↑ American Men of Science: Physical and Biological Sciences. Providence, N.J.: Bowker RR. 1967.
  2. 1 2 Zolfagharifard, Ellie (December 9, 2013). "Don't believe your eyes: These two blocks are actually the SAME shade of grey. (Just slip your finger over the join)". Daily Mail (DMG Media). ISSN 0307-7578. OCLC 16310567. Retrieved December 23, 2013.
  3. ↑ Purves, Dale (January 8, 2010). Brains: How They Seem to Work. FT Press. pp. 139–142. Retrieved December 23, 2013.
  4. ↑ Plait, Phil (December 7, 2013). "Viral Illusion Will—and Should—Have You Doubting Your Eyes". Slate (Graham Holdings Company). Retrieved December 23, 2013.
  5. 1 2 Riggs, Lorrin A.; Ratliff F.; Cornsweet J.; Cornsweet T. (1953). "The Disappearance of Steadily Fixated Visual Test Objects". Journal of the Optical Society of America 43: 495–500. doi:10.1364/josa.43.000495. Retrieved March 20, 2011.
  6. ↑ D.H. Kelly, ed. (March 30, 1994). Visual Science and Engineering: Models and Applications. CRC Press. p. 91. Retrieved December 23, 2013.
  7. ↑ Cornsweet, TN (September 1962). "The Staircase-method in Psychophysics". Am. J. Psychiatry 75 (3): 485–491. JSTOR 1419876.
  8. ↑ Cornsweet, Tom N. (1970). Visual Perception. New York, NY: Academic Press. p. 475. ISBN 0-12-189750-8.
  9. ↑ Cornsweet, TN; Crane HD (1973). "Accurate two-dimensional eye tracker using first and fourth Purkinje images". Journal of the Optical Society of America 63 (8): 921–928. doi:10.1364/JOSA.63.000921. Retrieved March 20, 2011.
  10. ↑ Cornsweet, TN (August 1973). "Computer-assisted automated refractions". The Australian Journal of Optometry 56 (8): 310–313. doi:10.1111/j.1444-0938.1973.tb00727.x.
  11. ↑ Kelly, DH; Crane, Hill, Cornsweet (1969). "Non-contact method of measuring small eye- movements and stabilizing the retinal image.". J. Opt. Soc. Am. 59: 509. Cite uses deprecated parameter |coauthors= (help)
  12. ↑ "Conferences, Workshops, Seminars" (PDF). The Linguistic Reporter. Center for Applied Linguistics. December–January 1982–1983. p. 9. Retrieved December 23, 2013. Check date values in: |date= (help) Note: Part of The Linguistic Reporter (1959–1982), Volume 25, published in 1982.
  13. ↑ "Leap in Detection and Diagnoses of Eye and Other Disorders". Medical Design Technology. Advantage Business Media. August 3, 2012. Retrieved December 23, 2013.
  14. ↑ "UC Berkeley teaching award".
  15. ↑ "Charles F. Prentice award". Retrieved March 21, 2011.
  16. ↑ "TN Cornsweet Google Scholar publications". Retrieved March 21, 2011.
  17. ↑ Cornsweet, Tom. "Why is Everything!: Doing Science by Tom Cornsweet". Retrieved December 17, 2013.
  18. ↑ "Curriculum Vitae: Tom N. Cornsweet: Professor of Cognitive Science, Electrical and Computer Engineering, and Ophthalmology, Emeritus: University of California, Irvine" (PDF). University of California, Berkeley. Retrieved December 17, 2013.

External links

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