When someone decides that they want LASIK, they rarely consider the type of laser that will be used to fix their vision. While it is true that there are many different lasers used by ophthalmologists to correct myopia or hyperopia, you may want to know a little about the one that will be used on your eyes, especially if you are concerned about some of the side effects on your night vision that you may have heard about. Halos and glare are extremely rare, but they have a bothersome effect on LASIK patients. One of the latest generation lasers that can solve these types of issues is called the Allegretto Wave excimer laser.
The Food and Drug Administration approved the Allegretto Wave laser in 2003 for use with LASIK surgery. Allegretto Wave uses PerfectPulse Technology. This technology basically means that the laser is calibrated for your individual eye and does not act as a blanket solution for all eyes. Think of your eye like a fingerprint: no one else has your exact eye. One of the problems with older lasers is that they may have acted as a one-size-fits-all solution. It is here where some of the problems with LASIK have occurred. With Allegretto Wave’s PerfectPulse Technology, the beam’s pulse hits your eye exactly where it should. Checkpoints are made even as the pulse works at 200 times per second. If an adjustment is needed, this can be done, if your eye moves out of the beam’s range, for example.
Allegretto Wave also uses something called wavefront-guided technology. This essentially creates a map of your eye. Because no two eyes are the same, the eye’s “cartography” is important at the microscopic level. Since the laser will be sculpting your cornea, it is necessary that a map be created so that the 200 pulses per second know where they’re going. When this is done, more corneal tissue is preserved.
One of the unique features about Allegretto Wave is that it is able to read a large optical zone. This is the zone of the pupil that is affected by night vision (the more light needed in the eye, the larger the pupil zone). Through reading and mapping the entire optical zone, the chances of halos and glare are nearly eliminated.
If you are in the New York City, Manhattan, or Long Island, New York area and would like to learn more about the Allegretto Wave laser, please visit the website of board certified ophthalmologist Dr. James Kelly.
Article Source:http://www.articlesbase.com/vision-articles/consider-the-allegretto-wave-laser-for-lasik-1523236.html
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Computer focus has unique visual demands that are unlike with other activities, so that a prolonged computer use may bring eyestrain and fatigue more easily. Some of the people under 40 can not remain accurately focused on the computer screen for a long period, or get tired from the frequent switch between the screen and the keyboard. Presbyopia on people above 40 may also cause CVS symptoms such as blurry vision and headache.
The simplest way to address CVS (Computer Vision Syndrome) is the special computer glasses, which are superior to regular prescription glasses. All those commonly used prescription glasses such as reading glasses, bifocal glasses and single vision glasses for myopia are not designed to suit computer use. The reason is that computer focus needs the intermediate zone of vision, which is closer than distance vision and farther than near vision. Even trifocals and progressive glasses can only cover a small portion of this area.
The University Of Alabama School Of Optometry has conducted a research of participants between 19 and 30, who either wear computer glasses or non-corrective glasses. Researchers recorded the performance of these people in finishing font tests. The result showed that people with computer glasses had higher work productivity than the other individuals.
Computer glasses have special designs that are not suitable for regular wear. A single vision lens with special power provides both the most comfortable computer vision and the largest vision field. This type of computer lens design reduces the risk of eyestrain, blurred vision and unnatural posture. For people with presbyopia, occupational progressive lenses or lined trifocals with larger intermediate zone provide the right solution. But they are not suitable for driving since the distance zone is narrowed. Occupational bifocal lenses offer a top lens part for intermediate vision and a bottom part for near vision.
Eyestrain can also come from bright office lighting. Anti-reflective coating can be used to reduce glare and UV absorbing coating can be used to block blue light emitted by fluorescent lights.
this article is come from:http://vision.firmoo.com/others/variations-of-computer-eyeglasses-for-cvs.html
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Article Source:http://www.articlesbase.com/vision-articles/variations-of-computer-eyeglasses-for-cvs-1337158.html