Agriculture
Keeping Bugs Away from Food
Protecting Cows—and People—from a Deadly Disease
Got Milk? How?
Amphibians
Salamanders
Toads
Bullfrogs
Animals
Blotchy Face, Big-Time Wasp
Sea Giants and Island Pygmies
Koalas, Up Close and Personal
Behavior
Honeybees do the wave
Contemplating thought
Memory by Hypnosis
Birds
Quails
Hummingbirds
Kookaburras
Chemistry and Materials
Fog Buster
Heaviest named element is official
Putting the Squeeze on Toothpaste
Computers
A New Look at Saturn's rings
Play for Science
Lighting goes digital
Dinosaurs and Fossils
Dinosaur Eggs-citement
Mini T. rex
Dino Takeout for Mammals
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Killer Space Rock Snuffed Out Ancient Life
On the Trail of America's Next Top Scientists
Petrified Lightning
Environment
Snow Traps
Forests as a Tsunami Shield
Plant Gas
Finding the Past
Big Woman of the Distant Past
Your inner Neandertal
Ancient Cave Behavior
Fish
Hammerhead Sharks
A Grim Future for Some Killer Whales
White Tip Sharks
Food and Nutrition
Building a Food Pyramid
Healing Honey
A Pepper Part that Burns Fat
GSAT English Rules
Adjectives and Adverbs
Finding Subjects and Verbs
Who vs. Whom
GSAT Exam Preparation Jamaica
2014 GSAT Results for Jamaican Kids
Tarrant High overcoming the odds
GSAT Scholarship
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT stars reap scholarship glory
GSAT Scholarship
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Detecting True Art
42,000 students will sit for the GSAT Exam in two weeks
Human Body
Dreaming makes perfect
Sea Kids See Clearly Underwater
Sleeping Soundly for a Longer Life
Invertebrates
Grasshoppers
Lobsters
Sea Urchin
Mammals
Bumblebee Bats
Skunks
Sea Lions
Parents
How children learn
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Einstein's Skateboard
The Mirror Universe of Antimatter
Black Hole Journey
Plants
Hungry bug seeks hot meal
When Fungi and Algae Marry
Cactus Goo for Clean Water
Reptiles
Rattlesnakes
Snapping Turtles
Pythons
Space and Astronomy
Mercury's magnetic twisters
Saturn's Spongy Moon
A Whole Lot of Nothing
Technology and Engineering
Smart Windows
Slip Sliming Away
Crime Lab
The Parts of Speech
Countable and Uncountable Nouns
What is a Noun
What is a Verb?
Transportation
Middle school science adventures
Reach for the Sky
Seen on the Science Fair Scene
Weather
Warmest Year on Record
Watering the Air
Weekend Weather Really Is Different
Add your Article

Switchable Lenses Improve Vision

Some people have the impression that wearing eyeglasses can make you look smarter. Someday, your glasses themselves might actually be smarter. Scientists are developing "smart" lenses that sense where your eyes are looking and automatically focus to help you see more clearly. The main market for the glasses is adults older than 45—perhaps your parents or grandparents. At this point in life, most people start to get worse at seeing things that are close to them, such as books and computer screens. When the decline begins, people usually start wearing reading glasses. Or, they get bifocals, which have divided lenses—a top part for seeing far and a bottom part for seeing near. Some kids with vision problems have to wear such glasses, too. University researchers are working with a company called PixelOptics, in Roanoke, Va., to replace bifocals with electric lenses that can switch quickly from one type of focus to another. "You don't have just the bottom half of your eyeglasses" for close vision, says electrical engineer David L. Mathine of the University of Arizona in Tucson. He's one of the inventors. "You get the whole view," he says. Each lens is made from two layers, and each layer is made up of two sheets of glass, with a thin layer of fluid sandwiched between the sheets. The fluid contains a transparent type of material called a liquid crystal, which is made of molecules that are shaped like rods. To change a lens' focus, scientists apply electricity to the inner surface of one of the glass sheets in each layer. In response to the electricity, the crystal rods rotate. Their direction determines how quickly light passes through the liquid-crystal layer. The process allows the material to focus light so that a crisp image forms inside the viewer's eyes. Scientists had made similar, electrically controlled lenses before, but these earlier lenses couldn't focus well enough or change focus quickly enough to be useful in eyeglasses, the inventors say. PixelOptics has announced that it also plans to make a version of the glasses that will help people achieve extrasharp vision—even better than normal 20/20 eyesight.—E. Sohn

Switchable Lenses Improve Vision
Switchable Lenses Improve Vision








Designed and Powered by HBJamaica.com™