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About the ANSI Z87.1-2003 standard:
•It is performance driven
•It has two levels of performance for non-plano (prescription) lenses.
- Basic Impact & High Impact
•It requires prescription safety frames to meet the High Impact test requirement with 2.0mm lenses.
NOTICE: Please be aware that an employee subjected to high impact may not be adequately protected if wearing lenses tested only for Basic Impact.
Description of the ANSI testing requirements:
High Impact Level Prescription Lenses
• Must not be less than 2.0mm thick
• The lenses shall be capable of resisting impact from a 6.35mm (1/4 in.) steel ball traveling at 45.7m/s (150 ft/s).
• Lenses passing test will include "+" mark.
• Marking by manufacturer with "W" as a trademark would look like this: W+
Basic Impact Level Prescription Lenses:
• Basic impact lenses shall be a minimum of 3.0mm thick.
• Basic impact lenses are not tested to stringent High Impact requirements.
• They will NOT be marked with a "+"
• Protectors with Basic Impact lenses will be delivered to the wearer bearing a Warning Label indicating that the protector only meets the Basic Impact Standard.
Prescription Frame
• All prescription safety frames must meet high-velocity and high mass impact resistance tests while retaining the lenses.
• The frame will be marked with Z87-2.
• All frames marked with Z87-2 can be used for Basic Impact lenses and High Impact lenses.
Sideshields
• Lateral protection shall be assessed using a rotation point 10mm behind the corneal vertex, which means that shields must now provide more coverage.
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