Background:
Sunglasses are like safety glasses that help to protect eyes against an excessive amount of sunlight. Your eyes are extremely sensitive to light and therefore eyes can be easily hurt by overexposure to the harmful rays both visible and nonvisible. Bright sunlight is just a disturbing annoyance but long-time exposure can lead to headaches, soreness, or even can cause permanent damage to lens, cornea, and retina. Sun’s exposure for short term effects is temporary vision loss like snow blindness while long term effects lead to cataract and night vision loss.
Sunglasses were initially invented for eliminating glare and could allow a comfortable view in bright sunlight. Those sunglasses were just like tinted glasses or kind of plastic lenses that used to reduce brightness. Darker lenses were a better choice for screening out more light. But to combat hazards of natural light, eyes need better protection than previous sun wear. So technology was developed for better screen out the harmful rays of sunlight. From cheap models to costly designer brands like Wiley x prescription safety glasses, sunglasses are available in the array of design and prices. The price of sunglasses has a relation with the ability to block UV light.
Materials:
Sunglasses contain a pair of filtering lenses that are held by a frame. Most of the lenses are made of plastic-like polycarbonate but still, glass is employed for top-quality brands. If you have an option to choose between polycarbonate vs Trivex lenses, keep sure both have equal qualities. Trivex is a little costly than polycarbonate because of their lack of availability. The high-quality lenses don’t produce lines and shapes because of optically accurate. The glass lens is highly scratch resistant and impact resistant and such a lens doesn’t have to pass any chemical treatment. Metallic oxide and soluble organic pigments are added in the lens material to reflecting or absorb certain frequencies light. The frames of sunglasses are manufactured by plastic or metal. Metal frames are little expensive they are made from other mixtures like nickel and silver.
Design:
In sunglasses design, two important elements are considered that are fashion and function. But from few decades, sunglasses have become a high fashion accessory and latest design are proof of their growing demands. Customize in sunglasses that are named as designer glasses, they promote their own specific image. The changing in design was not so functional but they are promoted for fashion appeal. The unique shape of lenses and frames and embossed logos are all the accessory of designer charisma. Now, you can order designer glasses online from any reputable online stores with your specific requirements.
Function:
From a functional point of view, sunglasses are manufactured for various outdoor activities. Sports lovers have their specific needs that are reflected in the creation of sunglasses design. For instance, sunglasses for trap shooters are designed in such a way that provides good contrast for better viewing on their target. On the contrary, sunglasses for skiers are manufactured from the protection of reflected light from snow-covered. Such type of lenses is known as blue blockers for the filtration of blue, violet, and UV rays. You can order designer Rx glasses with any shade that suit your lifestyle. Boatsman and fisherman have their own specific needs of sunglasses for their other activities.
Sunglasses can shield eyes in many ways and they can reflect or absorb specific light frequencies to reduce the amount of light to enter into eyes. Range of frequencies is held by changing the mixture of additive colors. The absorption strength is held by adjusting the additive amount. The finishing of color on lenses indicates that which part of the spectrum will be transmitted. For examples, dark yellowish color lenses can absorb blue, violet, and some portion of UV rays.
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