Saturday, 30 April 2011

How to Keep Good Eyesight in a Natural Way

Almost everyone has the bad vision problem in his own life, either myopia or hyperopia. In order to see better, we need to refer to some aided tools for help.

Spectacles are the very common assistance. However, we know spectacles have a lot of troublesome problems. We have to always clean the glasses or we cannot see clearly. We have to adjust the spectacles if the frames are not in good condition. We have to change a new pair when our eyesight becomes worse or our spectacles get broken. We also have to take the spectacles off if we do some sports. In one word, we have to be extremely careful when we wear the spectacles and we have to take good care of the spectacles every minute. Furthermore, a person with glasses is usually not as attractive as a person without it, and I think no one would like to wear the glasses all his life. Who like the abnormal eyes when we take off the glasses!

Someone may think the contact lens is a relatively good choice. Of course, in some way it is. But we know we have to poke our eyes in order to put the lens in when we try to wear it, it is likely to get the eyes hurt and the eyes are easier to inflame. Besides, the cost is really high if we would like a high quality contacts. I think no one would like an inferior contact lens when considering the eye safety.

Nowadays, laser eye surgery is said to be the most effective way to recover from bad vision. But when we think the unsuccessful operation and the post-surgical complications, most of us may feel a little afraid. We can not image the bad result of the surgery and on one want to put the eyes in risk.

Such being the case, whether there are natural ways to maintain good eyesight is a question remaining to all of us. Yes, there are some methods which can keep your eye health, which mainly depend your habits of diet and sleep. Eating a lot of vegetables every day, especially the carrots, has a good influence on your eyes. If you insist on doing that, one day you may find out that your eyes are improved. Resting is also a natural way to keep good eyesight. Every 45 minutes, you can move your focus from your work and close your eyes a little while, or you can do the eye focus and rotation exercise to keep the eye muscles relaxing. Muscle relaxing is a key factor to the good eyesight.

In conclusion, a healthy diet and a reasonable rest are two natural ways to keep good eyesight. Please insist on doing that every day.

Thursday, 28 April 2011

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Tuesday, 26 April 2011

Ski Sunglasses and Ski Goggles Buyers Guide

Sunglasses and goggles are a very important part of enjoying a winter sports holiday. They protect your eyes against harmful UV rays, impact and keep out the cold. Shatterproof lenses are recommended to protect against impact whilst eyewear that fogs up can be a safety hazard. Other priorities include optical clarity, good contrast (particularly on flat-light days) and of course style. The materials used in their construction should be suitable for use down to -20ºC.

At high altitudes, the harmful effects of solar UV radiation increases and at 2000 metres it can be 30% higher than at sea level. On ski slopes this problem is compounded because light is also reflected from the snow resulting in up to twice the normal amount of UV rays. So excellent UV protection is essential.

A key point to consider is the lens colour. Grey lenses are great for bright sunshine days and those with a mirror or multi-layered revo coating have excellent reflective properties which reduces glare whilst looking cool into the bargain. Whereas brown, amber, orange or pink lenses improve both contrast and depth perception and help to reduce glare. These are a good all-around choice if you expect changeable weather conditions. They provide the high contrast necessary in high-speed, high altitude sports by filtering out blue light which makes focusing difficult. Blue light is in higher concentrations at high altitude and is commonly found in diffused light on cloudy days. Yellow lenses are great for flat light or dull conditions because of their excellent contrast enhancement and depth perception properties. If everything is white, contrast is very important.

The eyewear you use for skiing and snowboarding is a very important safety element to your winter sports activity. It is important to purchase the right product to suit your type of activity and the anticipated weather conditions. No one pair of glasses or goggles can accommodate all the conditions you will encounter on the slopes, this guide will help you choose the most appropriate for you own skiing preferences.

Ski Sunglasses
Many skiers choose to wear ordinary sunglasses whilst on the slopes. Such sunglasses may be suitable, however high optical quality lenses that are fully UV400 compliant (block both UVA and UVB rays) are essential. The sunglasses themselves should give good peripheral protection to minimise UV rays and drafts from entering around the frames. We recommend you don't compromise just to save money, unsuitable sunglasses will ruin your winter sports experience.

Close fitting wraparound sunglasses with shatterproof, polycarbonate lenses provide the best protection and give a wider field of vision. The high base curve style of typical ski sunglasses demands optically correct de-centred lenses for clear distortion free vision. Anti-fog coatings on the lenses are also recommended. These chemical treatments leave a water-repellent residue that helps reduce fogging on the inside and outside of the lens. For minimum glare, ski sunglasses with polarised lenses may be preferred.

Sunglasses used for skiing and snow boarding should be durable so they don't break in the case of a fall or wipe-out. A headband attachment can be used so they don't fall off, even leisure skiers have the occasional tumble. Frames made from Grilamid TR90 are ideal because they are super-strong and designed to flex making them resistant to stress, cracking and fatigue. TR90 is an extremely lightweight and flexible material. It is virtually indestructible, has no risk of toxicity or allergy and is stable to UV exposure. Unlike sunglasses made from cheap materials that discolour from the sun's UV rays, these are made to last.

Ski Goggles
When choosing a pair of goggles there are many features to consider before making a purchase. The key factors you should consider are slope conditions and activity level. Look for models that offer full UV protection and that will be compatible with your helmet. Single lenses are generally less expensive but double lenses are less prone to fogging.

Ski goggles must be tough, durable and very comfortable. Good quality frames are usually made from polyurethane which is very lightweight and shock absorbing. As they are likely to be worn all day it is important to ensure a good fit. The foam lining and headband should be super-soft and ductile, hypoallergenic and have a high absorption capacity. A "V" nose within the foam lining gives a self adjusting and very comfortable fit around the nose without causing breathing problems.

Double lenses, anti-fog coatings and vented frames help to reduce fogging and sweat condensation. A dual venting system (DVS) with upper and lower vents will optimise the air flow over the inside surface of the lens. This reduces fogging and provides fresh air for your eyes. Spherical lenses provide extra high contrast and sharpen definition against distracting backgrounds delivering superior terrain definition in all light conditions.

Padded Sunglasses
As well as good UV protection, skiers and boarders need extra eye protection from the elements and even airborne objects. Lightweight, padded sunglasses with shatterproof polycarbonate lenses make fantastic ski or snowboard sunglasses. They have a "cushion" foam padding on the inside of the glasses to fit snug to your face and protect against snow, cold, wind, dust and debris. The pads are usually vented for maximum breath-ability. Padded sunglasses look just like ordinary sports sunglasses but the skier will enjoy higher performance levels and enhanced comfort on the slopes.

Photochromic Sunglasses
Photochromic sunglasses react automatically to the available sunlight. On overcast days the lens tints are medium to light. On sunny days they darken to a comfortable sunglass tint and when you go inside, they lighten up again. Since they darken and lighten in response to the amount of sunlight you can wear them from dawn to dusk and never have to take them off. Photochromic sunglasses are available in clear-to-smoke or yellow-to-smoke transitions. As yellow tinted lenses are ideal for dull or flat light conditions these are great for winter sports. The base yellow tint also helps to provide a darker lens in bright sunlight. Also known as photochromatic, transitional, day to night or reactolite sunglasses, they are available in a variety of lens and frame options including padded and rx-able versions.

Prescription Eyewear
Generally there are three types of ski and snowboard sunglasses and goggles for those who need prescription compatible eyewear: OTG (Over The Glasses) sunglasses and goggles that can fit over most prescription spectacles, rx-able models that have a removable insert which can be taken to an opticians and fitted with prescription lenses, and those which can have actual prescription lenses fitted into the frame. Goggles designed to fit over prescription glasses usually provide a quick-release buckle on the head strap to make them easier to take on and off.

Interchangeable Eyewear
One difficulty in choosing your ski or snowboard eyewear is which colour lenses to go for. Interchangeable lenses can solve this problem very cost effectively. Most include at least three lens sets - grey smoke lenses for bright sunny days, yellow lenses improve both contrast and depth perception on flat light days and clear lenses for very dull or dark conditions.

Sunday, 24 April 2011

Prescription Safety Glasses - What You Need to Know

Maybe you know you need to get your eyes checked, but you're reluctant because you need to wear safety glasses at work and you don't want to have to wear those giant goggles over your new glasses. The fact is, you can get prescription safety glasses that look pretty good these days. In fact, if you were to find yourself in a bind without your regular glasses, your prescription safety glasses could end up coming in very handy. This article will answer some of the questions you might have regarding this kind of eye protection.

Why should I get prescription safety eyewear at all?

The loss or damage of eyesight is one of the worst kinds of industrial accidents there is. It is also one of the most preventable. Over 90% of eye injuries could be prevented with proper eye protection. For those people who have some vision problems and need to wear corrective lenses, not everyone wants to wear contacts. Obviously they still need to be able to see clearly, so in the past the only option was to wear big goggles over the top of prescription glasses. Now you can get your safety glasses with your prescription built right into them.

Will I have to wear big, bulky, nerdy looking glasses?

No, you will not. Prescription safetyglasses these days look nothing like what you may be imagining. In fact, between the lighter, stronger, impact-resistant polycarbonate lenses and the fashionable frame options available, many hardly look like safety glasses at all. They will still be a bit bigger than your typical eyeglass though, but that is because you want to get the full wrap-around protection.

What do safety glasses protect against?

As mentioned above, the polycarbonate lenses that come in the better quality glasses (you shouldn't go with anything less than this) are impact resistant. This means that even if something were to hit them hard at high speed, they will not shatter into your eye. Safety glasses are also important to wear whenever you work around any kind of caustic chemicals, flying particles or power tools. They even help protect your eyes against damaging UV rays from the sun.

Do I have to pay for my own prescription safety glasses if I need to wear them at work?

That is a question you would definitely want to bring up with your employer. Many employers who require the use of eye protection will pick up the cost. If they do not, you should keep hold of your receipt as more than likely you can use that expense as a tax write off. Of course, don't take my word for it; consult with your accountant for the specifics.

Saturday, 23 April 2011

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