Richard Held

Richard M. Held
Born October 22, 1923
New York, NY
Died November 23, 2016
Northampton, MA
Nationality American
Education Harvard University, Columbia University
Occupation Professor
Employer Massachusetts Institute of Technology
Known for Vision research

Richard M. Held (October 10, 1922–November 23, 2016) was an American professor emeritus of Brain and Cognitive Sciences at the Massachusetts Institute of Technology.[1][2][3] His work in vision development contributed to the early years of vision research. Held held a Civil Engineering degree from Columbia University,[4] and earned a PhD in Experimental psychology with a specialization in space perception from Harvard University.[5][6][7] In 1973, Held was named to the National Academy of Sciences in recognition of his achievements in psychology.[8] He was also a member of the American Academy of Arts and Sciences.[9][10]

Career

After graduating from Columbia University and spending two years in the U.S. Navy, Held was invited to join Wolfgang Köhler at Swarthmore College.[11] Robert Wurtz later described their research as a precursor to Hubel and Wiesel's discovery of responses of single cell cortical neurons to light stimulae on the retina.[12]

While at Harvard, he designed his own lab equipment to study how people learn and relearn their spatial perceptions and coordination.[4] Held researched how a person learns to locate sound by displacing their ears with padded earphones attached to two microphones. Sounds were played in the anechoic lab around them. After hours of exposure, subjects could accurately locate the source of the sound.[5][6]

Working as an associate professor at Brandeis University, Held did a vision study involving the development of sight using kittens in the early 1960s. The kittens were exposed to light only under regulated test conditions to allow Held to examine the correlation between movement and sight in vision development.[13]

In his 1976 Massachusetts Institute of Technology research funded by National Institutes of Health, National Aeronautic and Space Administration, and the Spencer Foundation, Held worked with the idea that babies would rather focus on a pattern they can see than a "fuzzy pattern." In 1978, Held found that impediments to vision in babies, such as drooping eyelids, should be treated immediately to prevent vision impairment.[14]

Vision researchers Eileen Birch and Jane Gwiazda and Shinsuke Shimoto worked with Held in 1980. They found that a baby's ability to see in three dimensions first appears at 16 weeks and rapidly develops over the next five weeks. If proper eye coordination does not develop during this time, it can result in loss of vision in one of the eyes.[15] Held worked with Ernst Pöppel and Douglas Frost in 1983 in an experiment examining brain injured individuals who appeared blind but still showed localized responses to light. They found that pupils respond to light even after vision loss.[16]

Held was an adjunct professor at the New England College of Optometry pursuing the study of the development of myopia revealed by aging subjects.[17]

MIT Professor Emeritus Held[1] worked with Pawan Sinha researching in India to answer Molyneux's Question through Project Prakash. In this work, blind children are restored to sight and to the ability to be tested if the beginning of spatial vision requires movement-produced stimuli to develop visual capabilities.[18][19][20]

Research

Kitten vision study

After demonstrating the role of self-produced movement in visual adaptation, Held tested its role in the development of visual function. It was found that if two kittens kept in darkness were exposed to light only when one kitten was tied to a lever and allowed to move while another kitten was sitting stationary in a basket on the other end of the lever, moving only because the other kitten was pulling it, the kitten that was moving itself would learn to see while the stationary kitten failed to visually control its movements.[21] Further, if glasses with prisms were given to people to augment their vision, they were only able to adjust to the change in vision when moving around, showing that vision in humans and higher animals requires bodily responses.[13]

Infant visual acuity testing

In 1984, Held found that from four to six months old, females have a more highly developed visual cortex than males. At the same stage of development, males have a testosterone peak. Held was working with the staff of the Massachusetts Eye and Ear Infirmary to develop tests for detecting visual abnormalities in infants and children in 1984.[22]

Held later studied vision in babies. The infants were shown diagonal and horizontal or vertical lines to study astigmatism. He found that infant astigmatism, if given optical correction, does not show neural loss.[23][24] Because many eye exams for children at that time were superficial until the child went to school, children would develop preventable vision disorders. He presented his findings and method for testing visual acuity in babies at a vision symposium sponsored by the National Research Council of the National Academy of Sciences.[14] Held's test involved a baby being shown two patches of light in a dark room. Because babies look at the light with the most edges, there would be one blank light and one with alternating black and white bars. The bars would become thinner until the infant stopped showing a looking preference, indicating it could no longer see the difference.[25] This test was simple and accurate enough for vision testing to become a routine check in clinics for the first time. It was accurate enough to test infants from two weeks to one year of age.[26]

Held's work with Eileen Birch and Jane Gwiazda focused on eye coordination. Babies of varying ages were shown patterns that were two and three dimensional through a special set of goggles. If the baby paid attention to the three dimensional image longer, it meant the child could see three dimensions.[15]

Molyneux's Question study

Molyneux posed the question:

In Held's work with Project Prakash, five patients from age 8 to 17 received surgery to correct blindness and become fully sighted. The newly sighted subjects were able to discriminate between visually similar shapes. However, if the children felt an unseen object and were then asked to distinguish it visually from another similar object, they scored no better than guessing. However, within a week, the ability to compare tactual with visual representations is achieved.[20]

References

  1. 1 2 "What Do Babies Know?". Time. August 15, 1983.
  2. ↑ "Seeing Centers". MIT Reports on Research. 7 (1). July 1979.
  3. ↑ "People/Faculty". MIT. Retrieved June 8, 2016.
  4. 1 2 "Inside the World of Men - Engineering". Mademoiselle. March 1957.
  5. 1 2 "Men With Twisted Ears". Newsweek. September 29, 1952.
  6. 1 2 "Richard Held". Harvard Alumni Bulletin. 52 (15). May 13, 1950.
  7. ↑ John Kelso (March 2, 1952). "Scientist Teach Pigeons to Play Ping Pong at Harvard". Boston Sunday Post.
  8. ↑ "95 Named to Academy of Science in Recognition of Achievements". The New York Times. April 29, 1973.
  9. ↑ "Research Support Program" (PDF). National Science Foundation. Retrieved June 8, 2016.
  10. ↑ "6th Annual Report" (PDF). National Science Foundation. Retrieved June 8, 2016.
  11. ↑ "Report of the National Academy of Sciences". National Academy of Sciences. Retrieved June 8, 2016.
  12. ↑ Robert H. Wurtz (June 12, 2009). "Recounting the impact of Hubel and Wiesel". The Journal of Physiology. Retrieved June 8, 2016.
  13. 1 2 William Fripp (March 4, 1962). "We Must Move to See Well". The Boston Globe.
  14. 1 2 Richard Saltus (October 31, 1978). "What babies can see - some surprises unfold in research". San Francisco Chronicle.
  15. 1 2 "Psychology: Babies see three dimensions". The Times London. October 30, 1980.
  16. ↑ Jeremy M. Wolfe (February 1983). "Hidden Visual Processes". Scientific American. 248 (2).
  17. ↑ "Special Academic Programs". The New England College of Optometry. Retrieved June 8, 2016.
  18. ↑ Anne Trafton (June 19, 2012). "The Gift of Sight and the Science of Seeing". MIT Technology Review. Retrieved June 8, 2016.
  19. ↑ Nicholas Bakalar (April 25, 2011). "Study of Vision Tackles a Philosophy Riddle". The New York Times. Retrieved June 8, 2016.
  20. 1 2 "'Molyneux's question' gets answered after 300 years". News.com.au. April 11, 2011. Retrieved June 8, 2016.
  21. ↑ Loretta McLaughlin (June 16, 1964). "Kittens Aid Research Into Sight". Boston Herald.
  22. ↑ Andrea Marra (July 1984). "Visual Brain Development in Babies". MIT Industrial Liaison Program. 12 (7).
  23. ↑ "MIT Reports on Research". MIT Reports. 4 (1). July 1976.
  24. ↑ "Heredity and Eyesight". Newsweek. September 27, 1976.
  25. ↑ Matt Clark (May 31, 1982). "Repairing Babies' Eyes". Newsweek.
  26. ↑ "New fast Infant Eye Exams". Clinical Trends. October 1978.

External links

This article is issued from Wikipedia - version of the 11/25/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.