An estimated 2.4 million eye injuries occur in the United States each year, and nearly one million Americans have lost some degree of eyesight due to an eye injury, according to Prevent Blindness America.
If you are one of the nearly 50% of Americans that wear glasses, you may think that they provide adequate safety against vision-threatening hazards, but that is definitely not a safe assumption. There are two reasons why.
IMPACT RESISTANCE: “Dress” safety, or normal eyewear is required to be able to withstand the impact of a 5/8-inch steel ball weighing approximately 0.56 ounce dropped from a height of 50 inches onto the center of a lens. “Industrial” safety lenses up that to using a 1” ball dropped from a height of 60”. The bottom line is that true safety lenses can withstand a MUCH greater impact than standard lenses.
LENS RETENTION: Even if a lens is capable of withstanding the greater impact, that benefit is lost if the entire lens is dislodged from the frame, and driven into the eye socket area, causing great injury or blindness. You may have noticed that most frames have a “V” groove, and lenses have a corresponding “V” bevel; the two work together to keep the lenses in the frame. On true safety glasses the V groove is about 33% deeper than dress glasses so that lens retention is dramatically increased and preventing injury.
Short and simple, your eyeglasses are no match for the hazards they are commonly exposed to when working around the house or yard. Here are two MORE reasons why you need safety glasses: your right eye and your left eye. You have one of each, they are irreplaceable, and they are designed to work together.
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