|
|
|
8 Technical Aspects of the Martial Arts
In the past Japanese samurai, Mongolian horsemen, Manchu
bannermen, and European knights spent a lifetime learning the
highly complex art of fighting. It took many years of discipline
to master the techniques of unarmed fighting and fighting...
Beyond Boarders ... come ski with me
My earliest memory of skiing is an old picture my parents use to have. In it, I am about three and a half feet tall, bundled up tight, wearing the world’s largest sweater, woolen socks pulled up past my knees, and wrapped in a never-ending scarf. My...
Carlos Zambrano: Over-Shadowed by Greatness
With Kerry Wood, Mark Prior, Greg Maddux and Matt Clement on his staff, Carlos Zambrano has been over-shadowed by other household name pitchers. After todays (May 13th) start, in which Zambrano pitched 8 innings giving up 0 ER and striking...
Childhood Obesity
Along with the increase of obesity in adult, childhood obesity is on the rise. Around 15.5 percent of adolescents in the United States, aged 12 to 19 are obese. Even more alarming, about 15.3 percent of children ages 6 to 11 are obese. These...
Interested In the PowerBlock Adjustable Dumbbells? Don't Think About Spending a Penny Until You Read Every Word On This Page!
The Powerblock dumbbells are one of the most popular adjustable,
quick change dumbbells on the market. Backed by a 10 year
warranty, these "made in the USA dumbbells" are extremely
durable, replaces dozens of regular dumbbells and can be...
|
|
| |
|
|
|
|
Contact Lenses A Better Vision Option
There are over 34 million contact wearers in America. The idea of contact lenses has been around for hundreds of years. It is said that the first person to conceptualize the idea of contact lenses was Leonardo da Vinci in the early 1500's. It wasn't until 1971 that soft contact lenses entered the market, followed by GP or gas permeable contact lenses in 1978. Extended wear contacts received FDA approval in 1981 and disposable contacts were introduced in 1987.
Today's contact lenses do more than improve vision. Some contacts are specifically manufactured to change eye color only. With dozens of different colors available some contact lens wearers change their eye color slightly, and some go for a totally different look, such as brown eye to green or blue eye to brown. There are contacts that have special effect lenses that produce effects on the eye such as jaguar and zebra stripes, a yellow cat eye with a vertical pupil, black spiral, stars & stripes and fire. The FDA considers lenses described above as cosmetic only. Depending on your state you may not need a prescription to purchase them. If your contact lenses are to be corrective then you will require a prescription to purchase them.
Another recent advancement in contact lenses is light filtering lenses. These lenses work as do lens specific sport sunglasses by filtering certain lights such as blue light, so that baseballs, golf balls and tennis balls are easier to see. There are also
contact lenses that block ultraviolet light. Ultraviolet light has been linked to cataract formation.
There are many types of contact lenses available, hard contacts, gas permeable lenses and soft lenses. We will now give you some advantages, and disadvantages of each kind. Hard contact lenses are less costly in the long run as they aren't replaced often, and actually allow the wearer better, clearer sight. Soft contact lenses are easier to fit than hard lenses. Gas permeable or GP lenses allow you eyes to breath better and will not dry your eye out as much as soft lenses. Soft lenses are comfortable from the moment you put them on whereas hard lenses at first are very uncomfortable and take some getting used to.
There are safety concerns with any type of contact lenses. Extended wear contact lenses, soft or rigid, when worn long term and overnight can lead to risk of infection and corneal ulcers which can permanently damage eyesight. Most ophthalmologists believe it is better for your eye that you do not wear any type of contact lens overnight. Cleanliness if also of utmost importance for lens wearers. To reduce the risk of infection you should only use commercial sterile saline solutions when cleaning your contact lenses.
It is best to check with your licensed ophthalmologist to discuss which contact lens is best for you.
About the Author
Article courtesy of http://www.lense-shopper.net
|
|
|
|
|
|