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2. Ballistic eyewear - Wikipedia

   en.wikipedia.org/wiki/Ballistic_eyewear

   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.

3. Authorized Protective Eyewear List - Wikipedia

   en.wikipedia.org/wiki/Authorized_Protective...

   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]

4. Glasses - Wikipedia

   en.wikipedia.org/wiki/Glasses

   Man with glasses. A woman with glasses. 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.

5. CR-39 - Wikipedia

   en.wikipedia.org/wiki/CR-39

   The abbreviation stands for "Columbia Resin #39", which was the 39th formula of a thermosetting plastic developed by the Columbia Resins project in 1940. [ 1 ] The first commercial use of CR-39 monomer (ADC) was to help create glass-reinforced plastic fuel tanks for the B-17 bomber aircraft in World War II, reducing the weight and increasing ...

6. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   A prescription of −1.00 +0.25 × 180 describes a lens that has a horizontal power of −1.00 D and a vertical power of −0.75 D. Only ophthalmologists write prescriptions in + cylinder. An optometrist would write a prescription in - (minus) cylinder. All spectacle and contact lenses would be made in minus cylinder.

7. I tried those Pair Eyewear glasses with the magnetic ... - AOL

   www.aol.com/lifestyle/tried-those-pair-eyewear...

   With prices starting at $60 per frame, prescription lenses included, Pair is already pretty affordable. However, for a limited time, Yahoo Life readers can save 15 percent on any Pair Eyewear ...