Running involves jumping,turning and of course sweating depending on the weather and the race. Running sunglasses should be able to adjust to all the conditions you experience during the race at the same time offering protection and improving your vision.
How to choose running sunglasses.
You should always go for the running sunglasses with best fit on your face and those that allow you to turn your head and jump without dropping or sliding. Try the running sunglasses on and check to see that they are closely snugged to your face without causing you any discomfort.
Lightweight materials such as nylon and plastic are the best for running sunglasses frames. Some frame materials like metal and some plastics are heavy and not advisable for wearing for long hours.
Choose frames that are flexible and impact-resistant. Flexible sunglasses are less prone to breaking compared to stiff ones. Frames made from inflexible materials such as metal and polycarbonate can be made flexible with springed hinges. The best impact resistant material for running sunglasses is polycarbonate because it is light, more available and cheap. It is however not flexible.
Running sunglasses should be able to resist slip when it heats up or when you sweat. To achieve this go for running sunglasses with absorbent nose pads that absorb sweat before it trickles. Nose pads are also good for comfort and for prevention of slipping or disorientation of the sunglasses. Avoid metallic frames in running sunglasses during summer because they heat up very fast and increase sweating around your eyes.
For convenience,choose running sunglasses with adjustable nose pieces and temples which will allow you to always have the right fitting sunglasses even when the frame material expands.
Spherical-shaped running sunglasses and wraparounds are the best because they cover the whole eye area including the sides which offers maximum protection to your eyes by keeping off peripheral glare. Flat-shaped running sunglasses leave the top and the bottom open and allows some glare into your eyes.
Cable temples serve runners well because they coil around the back of the ear so that the sunglasses do not slip down upon bending. If you have straight temples on your running sunglasses,consider changing the temple to a cable one or fit them with a supportive rubber strap to keep them in place.
Ventilated running sunglasses frames are good for foggy and hot days or during vigorous running because they allow air circulation around the eye and minimize sweating which is often the cause of slip.
Look out also for running sunglasses with side-shields for extra peripheral shielding from wind, dust and glare. Side shields can be permanently fixed or removable. The side-shields should however not cause any distraction to your peripheral vision.
How to choose protective lenses for running sunglasses.
Lenses for running sunglasses should have the following qualities for more effectiveness :
Polarized lenses :Polaroid lenses come in handy when running on a bright day and there is a lot of reflected glare form the road,walls or grass. With polarized lenses, you are free from peripheral glare which is not possible with normal sunglasses.
Photo-chromic lenses :These lenses change their tint according to the amount of UV radiation they are exposed to. They are very suitable for long distance runners or runners passing through places with changing light conditions. For better results, go for polarized photo-chromic sunglasses which give more contrast and better visual acuity.
Mirrored lenses :Mirrored improve the performance of photo-chromic and polarized lenses by reflecting back the sun’s glare.
Running sunglasses lenses with an anti-reflective coating or an anti-glare coating also serve the purpose of keeping off glare by reflecting it away.
Anti-fog coatings prevent fogging around the eyes which is normally caused by poor weather,change in body temperature during the race or your breathing. Fogging can impair your vision and cause eyestrain.
An anti-scratch coating on your running sunglasses is a great way to maintain all the other coatings you might have which saves you the cost of replacing them after a short while.
Remember to always ask for running sunglasses with lenses made of shatter proof material that does not break or crack easily upon impact. Polycarbonate lenses are a good choice because they are both impact-resistant and lightweight. Polycarbonate is however susceptible to scratch and should always be fitted with an anti-scratch coating for longer service.
Best Lens colors for running sunglasses.
Grey is the neutral lens colour that does not cause color distortions or make you feel uneasy. It is good for bright days because it has the effect of decreasing the amount of light getting into your eyes. Blue green and brown tints are also good for running under harsh bright light conditions.
For dull or foggy days,choose running sunglasses with golden tints such as yellow, gold and amber. These tints can filter blue light and increase contrast which allows the runner to see bumps ahead of them.
New trend in running sunglasses.
Runners who are lovers of music have a reason to rejoice with the invention of running sunglasses with a built-in sound system that allows you to listen to music for up to six hours with a fully charged battery. The music system is lighter than an i pod or an MP3 player and with it you don’t have to run with dangling wires hitting your face every time you turn. It is also possible to download your own music into the player with a USB cable.
Article courtesy of best sunglasses