UV radiation can cause a lot of different harmful effects on our bodies. The most commonly heard about is skin cancer. The radiation from the UV rays can burn and damage skin, and over time lead to different types of skin cancer. However, there is more than just cancer that can be caused by these harmful UV rays. Damage to the eyes is another important effect a lot of people do not think about. This damage, no matter what part of the body, can occur at any time of the year, in sunny or cloudy weather. Summer however is the time where you need the greatest amount of protection.
First, you need sun screen with a minimum SPF of 15 for adequate protection. This needs to be applied every two hours and after swimming or heavy perspiring. On children, this is a must. This however only protects your skin. You still need something to protect your eyes, sunglasses.
There are many types of sunglasses available that you can buy, and almost every store, even gas stations carry them. What you need to be careful of is that they say UV protection. If it is just tinted plastic or glass, it's not going to protect you. Children are more susceptible to UV ray damage than adults. This is mainly true because children spend more time outside than adults do.
There are several types of sunglasses available for kids. They can be in a variety of colors, shapes, animals, and even what size they come in. Again, only buy glasses that have the UV protection. The child must be with you when you purchase the glasses so you can be sure that they not only fit the face properly, but also shield the eyes from all angles. The lenses of the glasses should be made of a polycarbonate and impact resistant. Never buy sunglasses made of glass unless prescribed by a doctor. Along with encouraging children to wear sun glasses, also have them wear a wide brim hat. These together should offer the child great protection.
There are many important things parents need to protect their children against. UV ray protection is just as important as any other thing. Since damage is done over time, children must be taught at a real young age how important wearing and reapplying the sunscreen, wearing properly fitted sunglasses, and also using a wide brimmed hat for ultimate protection. Teaching children at a young age will help to establish good habits that will last a lifetime, and they too will pass on to their children.
Eye damage later in life, such as cataracts could be from poor eye protection as a child. By then, it is too late, the damage has been done.
When sunglasses were first invented they were not to help protect your eyes or even for their good looks. They were actually invented so a roman emperor could watch gladiators. Another early use of sunglasses was for interrogations in China over 500 years ago. Also, judges in China wanted to hide their facial expressions so they would wear shades so the witnesses could not see their reactions.
In the 18th century sunglasses saw a change. James Ayscough began experimenting with tinted lenses in spectacles. When Sam Foster introduced the shades to America in 1929, they became an instant hit.
Different from their predecessors, these glasses were designed to protect their wearer's eyes from the sun. Lens polarization soon followed thanks to Edwin Land who utilized his panted Polaroid filter to make sunglasses. Sunglasses sure came a long way from the Roman and Chinese roots.
So what is the Big Deal about Polarized Glasses?
Upon striking the water or any reflective surface, light becomes polarized. Nearly all of the light waves in polarized light move in one plane. Normal light waves move in many planes, while polarized lenses allow only light in one plane to pass through the lens. Thus polarized glasses nearly eliminate the glare.
Although sunlight is not polarized, water's surface reflects and transmits the separated components. The light literally breaks into the vertical and horizontal component, with the horizontal component reflected first. To nearly eliminate the glare, engineers designed a vertically polarized lens. The sun's height also affects polarization. Fishermen often wear polarized glasses with filters to help block the light reflected by the water's surface. Thus they can see under the surface of the water.
Can polarized glasses really work against the sun and get rid of all reflections?
No, these sun glasses eliminate parts of the reflective light and thus reduce the glare.
Should people who like to fish think about purchasing polarized glasses?
Reflective surfaces, like the water, reflect a great deal of light, and thus the bright spots can distract the fisherman or even hide objects, like the fish. Good sunglasses will eliminate the glare with polarization. Natural or artificial light can polarize. Anytime you look at a lake or river, you are seeing naturally polarized light. The reflected glare off the water is the light that doesn't make it through the "filter" of the water, and thus you cannot see anything below the surface, even when the water is clear.
Polarized light results from light striking the surface of the water horizontally. Fishermen wear polarized lenses that allow vertically polarized light to enter, and thus he can see into the water and spot fish and structure.
How do polarized sun glasses and normal sun glasses differ?
It is important to buy glasses that you feel comfortable with. You should not purchase polarized glasses just because they say they are better. But the truth is that normal sunglasses merely decrease the intensity of all light passing through their lenses. Polarized light also decreases light, but it does so selectively. Thus the polarized lenses selective eliminate the reflection from the light off the water's surface.
Polarized glasses are great for a variety of outdoor sports and projects. They are great in the winter, summer, fall, and spring. You really do not need to buy any other sun glasses if you own a pair of polarized sun glasses.
If you are interested in purchasing a pair of polarized sun glasses the Internet is a great source of information. You may even find a few good sites to make your purchase from.
Media hype and Hollywood bring us images everyday of our favorite and most hated stars running around incognito, seemingly trying to hide their appearance with only one thing: a pair of sunglasses. Many people try to look the same and capture the same image appeal with an attractive pair of shades. However, we often neglect to consider the good that a great pair of sunglasses, not necessarily attractive but fully functional, can do for us.
Sunglasses can literally save our eyes. Blindness results from several things besides traumatic injuries and degenerative eye diseases. Cataracts and keratitis, both common eye diseases caused by sun exposure, can eventually lead to blindness. Just putting on a good pair of sunglasses can thus prevent these injuries and diseases along with blindness.
Individuals should don their shades from approximately 10 am to 4 pm when exposed to the elements. Good sunglasses will not just shade the eyes but will protect them from harmful UV rays that will damage their eyes and compromise their eye sight. Those who spend great amounts of time outside whether occupationally or recreationally should own a good pair of sunglasses.
Price does not always equate quality. Just because a pair of sunglasses cost $150 does not mean that it will protect the eyes. We need to look for glasses with specific labels on them such as "99 to 100 % UV ray protection" or certificates of approval. You can even find FDA approved glasses.
Wearing sunglasses will do more than just let a person run around semi disguised. As stated before, sunglasses can prevent UV damage to the eyes. And while some individuals prefer glasses with side protection, no pair offers a full range of protection. Light will always leak in. The key lies in finding the best pair for the wearer so that the wearer feels protected and comfortable.
Sunglasses will also reduce glare. Dozens of accidents occur every day because of the misguided perceptions of drivers caught up in the glare of the sun off wet roads. A good pair of polarized lenses will nearly eliminate the glare. Recreationally we can see the benefits of this as well. Those who enjoy water sports or skiing will want to find a pair of glasses that specifically reduce glare.
In addition to reducing glare, sunglasses can literally and physically protect the eyes from injury. No pair comes shatterproof, but a good pair will protect the eyes if a projectile comes near them. Good sunglasses will last and be able to withstand normal wear and tear that comes with this kind of protection.
Sunglasses will also keep the wind from hurting the wearer's eyes. Those who suffer from dry eyes will especially appreciate how the glasses will deflect harmful dry and dusty gusts.
In the end, it's not about the image that the sunglasses convey, though some snazzy pairs do exist. But great eye sight resulting from good sunglasses matters most.