According to ANSI Z-87 High Impact Standard, lenses must withstand the impact of a steel ball traveling at which speed?

The ANSI Z-87 High Impact Standard specifies that lenses used in safety eyewear must be able to withstand the impact of a 0.25 inch (6.35 mm) steel ball traveling at a velocity of 150 feet per second. This standard is critical in ensuring that safety glasses provide adequate protection against impact hazards in various environments, especially in construction, manufacturing, and other industrial applications. The requirement to endure impacts at this speed ensures that the lenses will not shatter or break under sudden force, thereby protecting the eyes from potential injuries caused by flying debris or other hazards. This makes compliance with the standard vital for anyone involved in occupations where eye safety is a concern.