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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.
The APEL was created in 2006 because statistics showed that about 10% of battlefield injuries at that time included eye injuries. [1] The APEL is updated periodically; it usually contains more than a dozen types of non-prescription and prescription spectacles and goggles for different duty situations and soldier preferences.
Goggles come in two styles, eyecup goggles, and cover goggles. Eyecup goggles completely cover the eye socket to give all-round protection. They have adjustable or elasticized headbands and often are equipped with ventilation ports to allow air in and prevent fogging. For example, swimming goggles to protect the eyes from salt or chlorine.
GI glasses are eyeglasses issued by the American military to its service members. Dysphemisms for them include the most common " birth control glasses " ( BCGs ) and other variants. At one time, they were officially designated as regulation prescription glasses ( RPGs ).
Goggles are available for horses used in speed sports such as horse racing. [12] In some traditions of horse mounted bullfighting , the horse may wear a protective cloth over its eyes. Goggles have been used on military working dogs , for protection in harsh conditions, such as sandstorms and rotorwash from helicopters.
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