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Tag: "lens" at biology news

Researchers publish first marsupial genome sequence

...s relationship, the opossum genome offers a unique lens though which to view the evolution of our own genome," said Kirstin Lindblad-Toh, Ph.D., co-director of the Broad Institute's genome sequencing and analysis program and the study's senior author. Marsupials and the ancestors of placental mammals d...

Artificial cornea offers better results for infants, some blind patients

...infants and adults, is about the size of a contact lens and is sewn into the patient's eyeball with a piec...The latest procedure also includes a large contact lens placed over the cornea to help protect it from inflammation and scarring. After the procedure patien...

An artificial cornea is in sight, thanks to biomimetic hydrogels

...t for cells that need to infiltrate the artificial lens and integrate it with surrounding natural tissue. ...way and replaced with a hydrogel contact lens. The lens becomes biointegrated when clear epithelial cells grow over the top of the inlayed lens. Inlays of...

Leading reason for corneal transplants comes into focus

...oration of the cells covering the clear, outermost lens of the eye affects more than 4 percent of the population over 40. Late in life, the dystrophy causes swelling of the cornea and can severely affect vision, making it impossible to see well even with glasses or contact lenses. It's believed that vari...

Key gene controlling eye lens development identified

...ne of the earliest critical regulators controlling lens development in the eye of the mammalian embryo. ...ators to remove Six3 activity from the presumptive lens ectoderm (PLE)--the area of the developing head where the lens will ultimately form in response to a...

Inheriting a tendency to brain infection

...eed to view common infectious diseases through the lens of such primary immunodeficiencies. "Understanding the genetic basis of the failure of the immune system should make it possible to devise novel ways to make it succeed," he said. Since the mid-1950s, most infectious disease researchers have be...

Toxic molecule may cause most common type of muscular dystrophy

... brain, in the lining of the intestines and in the lens and muscles of the eyes. ...

Purdue creates new low-cost system to detect bacteria

...also distort light passing through them, just as a lens changes light-wave patterns. "Therefore, we can treat the colonies as lenses and use Zernike polynomials," Rajwa said. Factors such as the shape of bacteria, their refractive indexes - or how much they bend light - the types of substances secrete...

First human trial of antibacterial contact lens

...the safety performance of an antibacterial contact lens to that of a standard contact lens. The compari...son involving ten people will evaluate eye health, lens performance on the eye and wearers' subjective responses. Biosignal will announce the trial's result...

New 'implanted contacts' designed to fix nearsightedness

...irst in the area to insert a new type of implanted lens to fix nearsightedness. "Think of it as a contact lens inside your eye," said Dr. Wayne Bowman , who is inserting the new implantable collamer lens, or IC...

Unique equine cataract surgery offered on routine basis

...amber using a jet of saline. The teams remove the lens using an ultrasound probe and administered an injection of intravitreal steroids to control postoperative inflammation of the eye. Professor Knottenbelt said: "This new surgery shows how effectively the latest human cataract surgical techniques c...

UC Berkeley researchers create a biologically-inspired artificial compound eye

...light beams that strike them, Lee used a condenser lens to bend his light source into a spoke-like pattern of beams that converges on the eye's dome. The end result is that the waveguides pierce the resin at angles that head toward the center of the dome, just like the converging ommatidia of an insect ey...

Cells direct membrane traffic by channel width

...e been identified, mostly in the kidney, brain and lens of the eye. Impaired function has been implicated in a variety of diseases. Aquaporins are a target of scrutiny for the Theoretical and Computational Biophysics Group at the Beckman Institute for Advanced Science and Technology. Using steered molec...

Insight into our sight: A new view on the evolution of the eye lens

...ns of special proteins called crystallins found in lens cells. Fish, frogs, birds and mammals all experie...rming an image. This has lead to the view that the lens evolved within the vertebrates early in vertebrate evolution, and it raises a long-standing question...

Scientists focus on 'dwarf eye'

...by growing, which changes the distance between the lens and the retina, the light-detecting layer of cells...ye. Once the retina is the right distance from the lens for proper focus of images on the retina, a largely unknown mechanism that uses visual experience ca...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...hone array and Katie Eckert--using a special night lens after sunset--videotaped the elephants' reactions. Directly below them in the lower level, Dave Shriver and Colleen Kinzley acted as "blind observers," monitoring the herds but never knowing which recordings, if any, were being played back through t...

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