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Ballistic sunglasses or prescription eyeglasses must meet the same requirements. In brief, the U.S. military standard requires that ballistic eyewear must be able to withstand up to a 3.8 mm (.15 caliber) projectile at 195 m/s (640 ft/s)) for spectacles and 5.6 mm (.22 caliber) projectile at 168–171 m/s (550–560 ft/s) for goggles.
Some styles can accommodate prescription lenses. Several types of goggles are available because they are optimized for certain purposes, such as regular use, use in vehicles, or use with night vision goggles. Some fit over regular eyeglasses, some can accommodate prescription lenses, and others are designed for those who do not wear eyeglasses. [4]
The military offers annual replacements for those who qualify, and personnel may request the government issued glasses in addition to several varieties of more attractive eyewear, in clear and tinted lenses, as well as prescription gas mask inserts and inserts for government-funded eye protection ballistic eyewear. [4]
Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
Safety glasses or spectacles, although often used as a catch-all term for all types of eye protection, specifically revers to protective equipment that closely resembles common eye wear. To meet most national standards, spectacles must include side shields to reduce the ability of debris to get behind the lenses from the side.
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