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This profile was last updated on 8/20/14  and contains information from public web pages and contributions from the ZoomInfo community.

Dr. David W. Russell

Wrong Dr. David W. Russell?

Application Scientist

Local Address: Sacramento, California, United States
Agilent Technologies Inc.
5301 Stevens Creek Blvd Lc P.O. Box 58059
Santa Clara , California 95052
United States

Company Description: Agilent Technologies, Inc. is a measurement company providing bio-analytical and electronic measurement solutions to the communications, electronics, life sciences...   more

Employment History

Board Memberships and Affiliations


  • Ph.D.
  • PhD
    University of Rochester
  • doctorate
    University of California at San Diego
  • Denison University
152 Total References
Web References
Agilent | Healthcare - Press Releases, 1 Dec 2000 [cached]
It eliminates the need for excessive pieces of equipment while allowing immediate access to vital patient information, saving time and money," said David Russell, world-wide marketing manager of Agilent's Patient Monitoring Division."The Agilent Telemetry System with optional EASI 12-lead ECG and the new TeleMon are ideal for ambulatory patients, who are best cared for in a flexible monitoring environment.This is yet one more way Agilent continues to help provide a seamless cycle of care for medical staff and patients alike."
About Agilent's Healthcare Solutions Group
Agilent's Healthcare Solutions Group is the worldwide leader in clinical measurement and diagnostic solutions for the healthcare industry.
SPIE Photonics West 2014 Event News and Photos [cached]
Featured speaker David Williams, Director of the Center for Visual Science, William G. Allyn Professor of Medical Optics, and professor of Optics, Brain and Cognitive Sciences, Ophthalmology, and Biomedical Engineering, described some recent work.
Color Perception Is Not in the Eye of the Beholder: It's in the Brain, 25 Oct 2005 [cached]
"We were able to precisely image and count the color-receptive cones in a living human eye for the first time, and we were astonished at the results," says David Williams, Allyn Professor of Medical Optics and director of the Center for Visual Science . "We've shown that color perception goes far beyond the hardware of the eye, and that leads to a lot of interesting questions about how and why we perceive color."
now an assistant professor at the University of Houston , used a laser-based system developed by Williams that maps out the topography of the inner eye in exquisite detail. The technology, known as adaptive optics, was originally used by astronomers in telescopes to compensate for the blurring of starlight caused by the atmosphere.
Williams turned the technique from the heavens back toward the eye to compensate for common aberrations. The technique allows researchers to study the living retina in ways that were never before possible. The pigment that allows each cone in the human eye to react to different colors is very fragile and normal microscope light bleaches it away. This means that looking at the retina from a cadaver yields almost no information on the arrangement of their cones, and there is certainly no ability to test for color perception. Likewise, the amino acids that make up two of the three different-colored cones are so similar that there are no stains that can bind to some and not others, a process often used by researchers to differentiate cell types under a microscope.
Imaging the living retina allowed Williams to shine light directly into the eye to see what wavelengths each cone reflects and absorbs, and thus to which color each is responsive. In addition, the technique allows scientists to image more than a thousand cones at once, giving an unprecedented look at the composition and distribution of color cones in the eyes of living humans with varied retinal structure.
Each subject was asked to tune the color of a disk of light to produce a pure yellow light that was neither reddish yellow nor greenish yellow. Everyone selected nearly the same wavelength of yellow, showing an obvious consensus over what color they perceived yellow to be. Once Williams looked into their eyes, however, he was surprised to see that the number of long- and middle-wavelength cones - the cones that detect red, green, and yellow - were sometimes profusely scattered throughout the retina,
In a related experiment, Williams and a postdoctoral fellow Yasuki Yamauchi, working with other collaborators from the Medical College of Wisconsin , gave several people colored contacts to wear for four hours a day. While wearing the contacts, people tended to eventually feel as if they were not wearing the contacts, just as people who wear colored sunglasses tend to see colors "correctly" after a few minutes with the sunglasses. The volunteers' normal color vision, however, began to shift after several weeks of contact use. Even when not wearing the contacts, they all began to select a pure yellow that was a different wavelength than they had before wearing the contacts.
"Over time, we were able to shift their natural perception of yellow in one direction, and then the other," says Williams. "This is direct evidence for an internal, automatic calibrator of color perception. These experiments show that color is defined by our experience in the world, and since we all share the same world, we arrive at the same definition of colors."
Williams' team is now looking to identify the genetic basis for this large variation between retinas. Early tests on the original volunteers showed no simple connection among certain genes and the number and diversity of color cones, but Williams is continuing to search for the responsible combination of genes.
Technology First Aimed at Heavens Now Makes 'Super' Human Vision Possible, 9 June 2000 [cached]
Vision scientist David Williams presented his
work this week at the summer meeting of the American Astronomical Society in Rochester, N.Y.
While the work is still in a research stage, eye-care giant Bausch & Lomb has licensed the technology and is working with University researchers to commercialize it.
"For years David has been way out in front exploring how we could enhance people's vision beyond what is normally thought of as perfect vision," says Scott MacRae, one of the world's leading cornea specialists and a widely recognized pioneer in refractive surgery.
MacRae is moving to the University's Medical Center this month to join Williams at the newly established Alliance for Vision Excellence , a new collaboration between the University and Bausch & Lomb that is dedicated to improving technology to correct vision-impairing anomalies of the eye.
Williams uses technology known as adaptive optics, which was originally developed by astronomers to sharpen images from telescopes by correcting for aberrations in the atmosphere. Adaptive optics have been implemented on several telescopes, including the giant Keck Telescope in Hawaii, resulting in remarkably crisp images. Williams, who is Allyn Professor of Medical Optics and director of the University's Center for Visual Science , has led a decade-long effort to apply the technology to improve ordinary human vision.
The system detects visual distortions so subtle that physicians didn't even know they existed until Williams' laboratory invented the system. Today a visit to the eye doctor focuses mainly on two types of aberration: astigmatism and defocus. Most prescriptions are intended to correct for these two defects. Williams' system can measure up to 65 different aberrations.
These precise measurements are sent to a sensitive "deformable" mirror - a mirror that can bend and customize its shape according to the measurements of a person's eye. Such flexible mirrors form the heart of traditional adaptive-optics systems used in astronomy. The mirror in Williams' laboratory is a two-inch-wide device that bends as little as one or two micrometers (just one-fiftieth the width of a human hair) thanks to 37 tiny computer-controlled pistons. This subtle shaping, done in response to the customized measurements of a person's optical system, alters the light in such a way that it exactly counters the specific distortions in a person's eye.
In the laboratory, Williams' team has shown that correcting these imperfections can result in greatly improved vision. He has published this work in the Journal of the Optical Society of America .
"When you look through an adaptive optics device, the world looks crisper," Williams says.
Williams is an expert on the circuitry of the human retina and the optics of the eye. After discovering some of the basic limits of the optical system of the human eye, he began exploring ways to improve ordinary human vision, eventually working closely with astronomers and other adaptive-optics experts. The research is now funded by the National Science Foundation Center for Adaptive Optics (based at the University of California, Santa Cruz), the National Eye Institute , and Bausch & Lomb .
Williams has found that the visual acuity of the human eye can be somewhere around 20/10. While adaptive optics may someday help patients approach that level, he says that acuity isn't the most noticeable improvement.
In the past, Williams has used the system to look into the eye. In a series of papers in such journals as Nature , Williams' team has published the best images ever obtained of the living human retina.
"Someday you may just look into a wavefront sensor as David has developed, and in one quick second we'll have all the information needed to improve someone's vision dramatically."
Clearest Images of Retina Reveal Remarkable Randomness, 10 Feb 1999 [cached]
The findings were possible thanks to a laser-based system developed by David Williams and colleagues at the University over the last decade that maps out the topography of the inner eye in exquisite detail.
Williams, director of the University's Center for Visual Science , leads an effort to apply the same technology to human vision.
Roorda and Williams took unprecedented photographs of the retinas of three people, two with normal color vision and one with color vision problems.
"This random arrangement is not at all what we expected," says Williams.
"Adaptive optics makes the world look crisper," says Williams, who is the William G. Allyn Professor of Medical Optics and a faculty member in the departments of brain and cognitive science, optics, and ophthalmology.
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