Environmental Engineering Reference
In-Depth Information
when. choosing. eye. protection. for. employees. who. wear. eyeglasses. with. corrective.
lenses..Consider.choosing.the.following:
.
1.. Prescription.spectacles,.with.side.shields.and.protective.lenses.meeting.the.
requirements. of. ANSI. Z87.1. that. also. correct. the. individual. employee's.
vision
.
2.. Goggles.that.can.it.comfortably.over.corrective.eyeglasses.without.disturb-
ing.the.alignment.of.the.eyeglasses
.
3.. Goggles. that. incorporate. corrective. lenses. mounted. behind. protective.
lenses
Protective.eyewear.must.be.provided.to.employees.who.wear.contact.lenses.and.
are.exposed.to.potential.eye.injury..Eye.protection.provided.to.these.employees.may.
also.incorporate.corrective.eyeglasses..Thus,.if.an.employee.must.wear.eyeglasses.
in.the.event.of.contact.lens.failure.or.loss,.he.or.she.will.still.be.able.to.use.the.same.
protective.eyewear.
Often. called. safety. spectacles,. protective. eyewear. is. made. with. safety. frames.
constructed.of.metal.and/or.plastic.and.itted.with.either.corrective.or.plano.impact-
resistant.lenses..They.come.with.and.without.side.shields,.but.most.workplace.opera-
tions. require. side. shields.. Impact-resistant. spectacles. can. be. used. for. moderate.
impact.from.particles.produced.by.such.jobs.as.carpentry,.woodworking,.grinding,.
and.scaling..Side.shields.protect.against.particles.that.might.enter.the.eyes.from.the.
side..Side.shields.are.made.of.wire.mesh.or.plastic..Eye-cup.type.side.shields.provide.
the.best.protection.
Each.type.of.goggle.is.designed.for.speciic.hazards..Generally,.goggles.protect.
eyes,.eye.sockets,.and.the.facial.area.immediately.surrounding.the.eyes.from.impact,.
dust,. and. splashes.. Some. goggles. it. over. corrective. lenses. (see. Figure 24.4).. The.
speciic.use.or.application.for.each.type.of.protective.eyewear.found.in.Figure 24.4.is.
shown.in.Table 24.1.which.is.to.be.used.in.conjunction.with.Figure.24.4.
Welding.shields.are.constructed.of.vulcanized.iber.or.iberglass.and.itted.with.a.
iltered.lens;.these.protective.devices.are.designed.for.the.speciic.hazards.associated.
with.welding..Welding.shields.protect.employees'.eyes.from.burns.caused.by.infrared.
or.intense.radiant.light,.and.they.protect.the.face.and.eyes.from.lying.sparks,.metal.
spatter,.and.slag.chips.produced.during.welding,.brazing,.soldering,.and.cutting..The.
intensity.of.light.or.radiant.energy.produced.by.welding,.cutting,.or.brazing.opera-
tions.varies.according.to.a.number.of.factors,.including.the.task.producing.the.light,.
the. electrode. size,. and. the. arc. current.. Table 24.2. shows. the. minimum. protective.
shade.for.a.variety.of.welding,.cutting,.and.brazing.operations..To.protect.employees.
who.are.exposed.to.intense.radiant.energy,.begin.by.selecting.a.shade.too.dark.to.see.
the.welding.zone..Then.try.lighter.shades.until.one.is.found.that.allows.a.suficient.
view.of.the.welding.zone.without.going.below.the.minimum.protective.shade.
Laser.safety.goggles.provide.a.range.of.protection.against.the.intense.concentra-
tions.of.light.produced.by.lasers..The.type.of.laser.safety.goggles.chosen.will.depend.
on.the.equipment.and.operating.conditions.in.the.workplace..Laser.safety.goggles.
speciically.designed.to.protect.employees'.eyes.from.the.speciic.intensity.of.light.
produced.by.the.laser.should.be.provided..The.level.of.protection.will.vary.according.
