Tag: "lens" at biology news

The human eye can self-correct some optical faults

...ness or shape of the cornea or a less-than-perfect lens can cause the exiting light rays to become nonparallel. A test pattern (produced by light passing though regularly spaced lenslets to form a grid, something like the lines on graph paper) should form a regular array of luminous points in an opticall...

Study of living eye in real time now possible with optics technology

...fers from natural irregularities in the cornea and lens of the eye, and even in people with normal, 20/20 ...curately measure the defects in the cornea and the lens and compensate for them to produce detailed microscopic images and video of human retinas. In his la...

Study employs backyard scientists to document global warming impact

...st waiting for someone to look at them through the lens of climate change." The regular recordings of the ecologically curious, when joined with data from researchers around the world and analyzed, show that animals of all kinds, as well as plants, appear to be shifting behaviors, seasonal timing and loc...

Combining global environmental changes yields surprising ecosystem response

...arnegie team views the planet through a biological lens to probe the function, assess the fragility, and explore the integration of the world's ecosystems. They tackle issues such as the global carbon cycle, the role of land and oceanic ecosystems in regulating climate, the interaction of biological dive...

World's largest scientific society convenes regional meeting in Charleston, S. C., Nov. 13-16

...plastics Scientists have developed an ophthalmic lens that is 40 times more scratch resistant than currently available ophthalmic lenses. (Charles K. Chiklis, TriboFilm Research, Inc., Raleigh, N. C., 919-838-2844, ext. 4, chiklis@tribofilmresearch.com Plasma coatings for medical devices Scientists...

November GEOLOGY and GSA TODAY media highlights

...n size) have been discovered in an orthopyroxenite lens within a mantle-derived peridotite body from the Western Gneiss Region (WGR) of the Norwegian Caledonides. During the Caledonian orogeny (420380 Ma) Baltica and Laurentia collided, resulting in the westward subduction of Baltica underneath Laurentia....

New antibacterial coating may prolong contact lens life

...the past, based on a study involving a new contact lens coating that kills bacteria. The study involved ra...does not interfere with the ability of the contact lens to let in oxygen, or its prescription, Reid said. Nor is there any leaching of the selenium, he add...

Physics tip sheet #20 July 3, 2002

...sually difficult to obtain this information as the lens is close to transparent, making optical measurements near impossible. Preprint: http://www.arxiv.org/abs/astro-ph/0206503...

Physics tip sheet #18 June 19, 2002

...is emitted in one direction. The droplet acts as a lens that focuses the incoming laser energy. The energy heats the water so much that it forms a plasma around 5000-7000 degrees. This temperature, similar to the sun's surface, causes light to be emitted in the visible spectrum. Journal article: Available...

Scientists document water molecule movement across cell walls

...ave 10, with many of them in the kidney, brain and lens of the eye. When working correctly, said Klaus Schulten, the Swanlund Professor of Physics at the UI, the transport of water between plant cells lets flowers bloom and leaves stand sturdily, for example. In mammals, the machinery processes water eff...

UC Berkeley researchers are developing a microsized microscope that can peek inside living cells

...d, showing for the first time that his microscopic lens could perform as well as a conventional one. "Hone...imilar to that used to manufacture microchips. The lens is made of a tiny drop of polymer shaped by surface tension and hardened by exposure to ultraviolet ...

New contact-lens materials will revolutionize the industry, UT Southwestern researchers report

...ed prospective safety of the new silicone hydrogel lens materials. The significance of our study is that f... lens-associated increases in bacterial binding by lens type and wearing schedules, which previous benchmarkstudies had never addressed. Cavanagh and his te...

Brittlestars use crystal lenses to spot approaching predators unique visual system is the first of its kind to be discovered in animals inhabiting the earth today

... axis is roughly perpendicular to the plane of the lens array. This means that the calcite lens array is capable of transmitting light without splitting it in different directions. But does the l...

PNNL captures picture of fish passage with acoustic camera

...y Identification Sonar or DIDSON, uses an acoustic lens and can operate on two frequencies. By using up to 96 different sonar beams, the system flushes out more background noise and allows better image processing. More information is available at http://www.apl.washington.edu/programs/DIDSON/DIDSON.html ...

Understanding lens development

...scovered the key molecular event behind vertebrate lens induction. Despite being a topic of research for one hundred years, the mechanism of lens development has remained relatively elusive. However, published in the May 15th issue of Genes & Dev...

Dangerous beauty: Fungal flowers offer clues to biofilm formation on medical implants

...al infection can lead to complications for contact lens wearers and more seriously patients with hip replacements. Often, the only way to treat the problem is to remove the implant," says Fink, director of the Whitehead Institute. "Our work represents a key step toward understanding how fungi stick to pla...

Sightless cavefish may offer clues to eye growth, Science authors report

...n instead develop a normal eye after receiving the lens of a sighted, surface-dwelling fish of the same sp...y yet whether developing cavefish gain sight after lens transplantation. But, the small, dark-dwelling creatures suggest a simple method for quickly testing...

Laser light from Free-Electron Laser used for first time in human surgery

...al field. The hand piece that Jansen designed hasa lens that focuses the beam down to a 0.2 millimeter spot, the size required to concentrate the beamfor effective tissue removal. In 1995, an award from the W.M. Keck Foundation allowed the FEL center to add two human operatingsuites. Before they could pe...

Researchers solve vision mystery

... loss of transparency that develops in the natural lens of theeye," explains HSC staff ophthalmologist Dr..... To remove the cataract,we must remove the entire lens of the eye which leaves the eye with no means tofocus the light that can now enter. The contact lens...

Understanding Earth's Underwater Forests: Kelp Demography Off The Coast Of California

...appreciate these magnificent places is through the lens of a diving mask.Sometimes encompassing several miles of area with towering vegetation, thickcanopies, and abundant wildlife, these underwater forests are unfamiliardestinations for the average weekend hiker. In the May issue of EcologicalMonographs,...

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