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2. List of bespectacled baseball players - Wikipedia

   en.wikipedia.org/wiki/List_of_bespectacled...

   For many years, wearing glasses while playing the sport was an embarrassment. [1] Baseball talent scouts routinely rejected spectacled prospects on sight. [2] The stigma had diminished by the early 1960s and by one estimate 20 percent of major league players wore glasses by the end of the 1970s.

3. 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.

4. Eye protection - Wikipedia

   en.wikipedia.org/wiki/Eye_protection

   Eye protection is protective gear for the eyes, and sometimes face, designed to reduce the risk of injury. Examples of risks requiring eye protection can include: impact from particles or debris, light or radiation, wind blast, heat, sea spray or impact from some type of ball or puck used in sports. Eye protection are typically separated into ...

5. Eyewear - Wikipedia

   en.wikipedia.org/wiki/Eyewear

   Eyewear. Eyewear is a term used to refer to all devices worn over both of a person's eyes, or occasionally a single eye, for one or more of a variety of purposes. Though historically used for vision improvement and correction, eyewear has also evolved into eye protection, for fashion and aesthetic purposes, and starting in the late 20th century ...

6. Authorized Protective Eyewear List - Wikipedia

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

   The eyewear fails the test if the aluminum foil witness sheet is punctured or if the eyewear is cracked. In addition to ballistic performance, the U.S. military standard includes requirements for optical clarity, protection from UV rays, fit, chemical resistance, and environmental stability (properties won’t be changed by exposure to a range ...

7. Adjustable-focus eyeglasses - Wikipedia

   en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

   Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both. Current bifocals and progressive lenses are static, in that the user has to change their eye position ...