Safety Glasses (Impact-Rated Eye Protection)

identity

Name: safety glasses — eye protection, here spectacles and goggles, marked by the manufacturer as meeting the applicable ANSI/ISEA Z87.1 requirements for the hazards listed on the product; distinct in kind from ordinary prescription eyeglasses or sunglasses, which carry no such marking. Use "spectacles" for open-frame protectors, "goggles" for protectors that fit around the eyes, and "face shield" for secondary face coverage; these have different geometries. This entry is scoped to spectacles and goggles and excludes two mechanically distinct cousins: the Face Shield (a standoff barrier, a separate entry) and hearing protection (earmuffs and earplugs, unrelated in mechanism; its entry is live).
Regional / alternate names: "safety spectacles" (the term in early industrial-safety literature); "safety goggles" for the sealed variant; "OTG" (over-the-glasses) for models designed to fit over prescription eyewear.
Family / category: personal protective equipment (PPE), like the corpus's Respirator entry; not a shaping or joining tool, but purchasable, with a correct-use envelope, real misuse classes, and matching data the app needs.
One line: a residual layer of protection between a shop's flying debris and a maker's eyes. It reduces the risk of eye injury from the hazards for which the complete protector is rated and fitted; it does not stop debris, contain a failing workpiece or wheel, or replace guards and safe work practice.

✦ how NOT to use it

not-for: relying on open-frame spectacles against fine dust or liquid splash; the seal and venting design is what controls those exposures, and OSHA selects D4/D5/D3 goggles for them [R-SMC3]. Relying on a face shield alone, with no spectacles or goggles underneath, against an impact hazard [R-AAW1]. Relying on eye protection as containment for a failing workpiece or wheel.

dangerous: operating a lathe, bench grinder or wire wheel with zero eye protection is the most consequential and most repeated failure in the sourcing, with a reported permanent eye loss (1961MGA's Garage Journal account) and multiple near-misses [R-GJ]. Substituting PPE for upstream controls is the second: eyewear does not replace machine guards, workholding, correct wheel and accessory selection, speed limits, inspection or position. 3M's current spectacle instructions call protection limited, "impact resistant but not unbreakable," and exclude severe impacts such as fragmenting grinding wheels or abrasive discs; they also say machine guards must be used where appropriate and supplemental protectors such as face shields must be used over spectacles in high-exposure areas. Practitioner Michael Mills notes the high-impact spectacles still "flex easily between a thumb and one finger," and Bill Boehme adds that stopping a laceration does not stop the concussive force of an impact reaching the skull [R-SMC1]. Debris can also arrive around the protector: an inside-the-shield ricochet (Provincial) and debris from below the shield (Iwamoto) are reported [R-GJ][R-SMC2].

damaging: using scratched, pitted or otherwise damaged lenses or frames. Replace them, and follow the manufacturer's directions; a single practitioner's report of "starburst" marks on a shield is an illustration, not an established mechanism [R-AAW2].

beginner-trap: assuming any pair of glasses (reading glasses, fashion sunglasses, a co-worker's spare pair) protects; only protectors marked by the manufacturer as meeting the applicable standard carry that claim, and that is a compliance claim, not an independent-test guarantee. Not knowing the Z87 versus Z87+ distinction [R-SMC1]. Wearing OTG glasses over prescription eyewear and assuming the fit equals true prescription safety glasses; practitioners describe distortion and gap problems with strong prescriptions [R-SMC3]. Trusting an unmarked or ambiguous shield or guard material: an extended Sawmill Creek debate over whether a lathe guard is polycarbonate or shatter-prone acrylic is a real instance [R-SMC2]. Matching one spectacle to every "shop" or "dust" task.

lineage-misuse: treating goggles and glasses as interchangeable, when goggles are selected for dust and splash and open spectacles are not [R-SMC3]. Treating a face shield as a replacement for spectacles rather than a layer over them; two independent accounts of debris reaching the eye despite a shield, from below and from behind, are in the human-side sources [R-SMC2][R-GJ]. Treating the 1880 glare patent as the origin of impact eyewear.

correct use

What it is genuinely good at. Reducing the risk of eye injury from the hazards for which the complete protector is rated and fitted: flying chips and particles (with impact marking and side coverage), dust and splash (with the matching goggle), and so on. It is a residual layer, and it is not unbreakable.

Start with the hazard assessment and upstream controls. Machine guards, correct workholding, rated and compatible accessories and wheels, rated speeds, pre-use inspection, dust control, a safe operating position, and removal of damaged equipment are not optional because PPE is present. OSHA's woodworking lathe page lists guarding and work practices: hoods or shields over the cutter head, long curved guards over long stock so loose stock cannot be thrown, a plexiglass tool guard on hand-fed lathes, a brake that stops the stock after power-off, the tool rest close to the stock and adjusted only when the lathe is stopped, no loose clothing or gloves, and no stock with checks, splits, cracks or knots (that page does not address eye protection itself).

Then select the protector by hazard (OSHA SHMS chapter 8; NIOSH).

• Flying fragments, chips, particles: a complete compatible protector with the applicable +/Z87+ impact marking and side coverage; a face shield worn over spectacles or goggles where the assessed hazard includes the face. NIOSH tells workers to look for Z87+ on the frame or lens [relayed from the reviewer; toolbox talk fetch failed]. OSHA 29 CFR 1910.133 requires side protection when there is a flying-object hazard.
• Nuisance dust: goggles marked D4 (direct or indirect vents). Fine dust: goggles marked D5 (indirect or no vents), or a full-facepiece respirator.
• Liquid splash/droplet: goggles marked D3 with indirect venting; a face shield over goggles for severe exposure.
• Irritating mist, molten metal, heat, welding, lasers and other optical radiation: task-specific protection, filters and markings; the Z87 selection guide read here does not cover hot sparks, irritating mist, lasers, arcs or welding.
• Fit and compatibility: fit to the individual; "ensure goggles fit tightly to the face"; check interference with respirators, hearing protection, helmets, prescription eyewear and hair; where several hazards exist, protect against the highest level of each.

What the markings mean. Z87 is standard compliance; + / Z87+ is the impact marking. For orientation only: NIOSH describes a high-mass test as a 1.1-pound object dropped from 50 inches, and 3M's product guide gives a high-velocity test with a quarter-inch steel ball at 150 ft/s for spectacles and 250 ft/s for goggles, with a 500-gram pointed projectile dropped from 50 inches for high mass. Values are protector-specific and edition-specific; read the applicable edition. The tests do not predict survival of every real-world projectile.

Inspect and replace. Inspect before each use; replace immediately if a lens is pitted, cracked, scratched or otherwise damaged (3M), and replace damaged frames. Follow the manufacturer's cleaning and replacement directions.

✦ matching — the workbench's first read

Does: reduces the risk of eye injury from the hazards for which the complete protector is rated and fitted. It does not "stop" debris.

Suits — hazard fields, not a flat operation list. For each task record: impact energy and type; dust class; splash or mist; heat or molten metal; optical radiation wavelength and shade; face exposure; side exposure; prescription need; compatibility with other PPE; and the protector's markings.

• Flying chips and particles (sawing, routing, planing, chiseling, sanding-off, nail-gun use): a protector carrying the applicable +/Z87+ impact marking with side coverage.
• Nuisance dust (some sanding): D4 goggles. Fine dust: D5 indirect or non-vented goggles, or a full-facepiece respirator. Open spectacles let dust travel around the lens and are not the fine-dust answer, as a forum practitioner also says ("Safety glasses were never designed to protect against dust particles") [R-SMC3].
• Liquid splash: D3 indirectly vented goggles; face shield over goggles for severe exposure.
• Lathe turning, bench or angle grinding, wire-wheel work: a high-energy class. Eye and face protection is only the residual layer here. Require the manufacturer-specified machine guards and shields, sound workholding, rated wheels and accessories at rated speeds, pre-use inspection and a safe position out of the line of fire first, then an impact-marked protector, with a properly rated face shield over spectacles or goggles when the assessed hazard calls for face protection. PPE cannot guarantee protection from an ejected workpiece or a fragmenting wheel; 3M's instructions exclude "severe impact hazards such as fragmenting grinding wheels or abrasive disks."

Kit-fit:

• Pairs with: a face shield (glasses underneath, shield over, not either/or) [R-AAW1]; a respirator or dust mask for simultaneous dust exposure, as the Respirator entry frames it: a last layer, not a substitute for source control; hearing protection, with a compatibility check.
• Substitutes for: nothing else in a maker's PPE kit performs this function; hearing protection and respiratory protection are separate categories.
• Cannot replace: guards, workholding, rated accessories, and standing out of the line of fire. Practitioner sources treat position as the primary control and eye protection as the secondary layer [R-AAW1][R-SMC2].

Not-for (project-keyed): open spectacles for fine dust or liquid splash. A flat face shield alone for impact: named turners describe typical turning shields as having "almost no impact resistance" on their own [R-AAW1]. A protector chosen by product-family name alone: use the hazard markings (+/Z87+ impact, D3 splash, D4 dust, D5 fine dust, and filter markings for radiation), and note that a protector addresses more than one hazard only when its complete marking and instructions say so.

Access: wearing is simple, but correct selection, fit, prescription accommodation and compatibility with other PPE require knowledge; forum accounts show most users learn the Z87 / Z87+ distinction only after a near-miss or a fit failure. Not wearing eye protection at all is the most consequential failure in the sourcing (see how NOT).

Revival: for any maker who owns a lathe, a bench or angle grinder, or a wire wheel; many corpus entries assume "appropriate eye protection" without saying what that means for an operation's energy level, and this entry says the hazard assessment and upstream controls come first.

anatomy

The lens — the impact-resisting element. Lenses and frames can be made from several materials (polycarbonate, CR-39, Trivex, injection-molded thermoplastics and polyurethanes, among others); the material's name does not establish protection. NIOSH says performance is established by the complete protector's test, including lens retention: "The lens must survive and stay intact in the glasses frame" [read in fix pass]. The frame — holds the lens and, on a genuine safety design, provides side protection (solid or mesh side shields or wraparound coverage) that a plain eyeglass frame lacks; a practitioner treats side shields as the feature that separates safety glasses from ordinary prescription eyewear [R-SMC3]. The seal (goggles) — a gasket or foam surround that contacts the face, which with the venting design determines dust and splash performance. The venting (goggles) — direct, indirect or none; this is hazard-specific (see matching). The temple/strap — the retention mechanism. The marking — Z87 or Z87+ and related marks on the lens and frame; per NIOSH the rating is required on both. Verify the marking on the components, and follow the product instructions.

variations (living)

Names below describe form; the selection rule is the hazard and the complete marking (see correct use and matching).

• Spectacles marked for standard compliance (Z87) — a standards-compliance mark, not shorthand for every impact application. Not selected for flying fragments, chips or particles on that mark alone.
• Spectacles or goggles marked for impact (+ on spectacle lenses, Z87+ on other lenses, per OSHA's table) — the applicable marking for flying-fragment hazards, with side coverage; NIOSH: "Z87+ (or Z87-2+ prescription)" for high-impact eyewear.
• Safety goggles, by venting — direct, indirect, or non-vented; marked D3 (splash/droplet), D4 (dust), D5 (fine dust) as the product states. Direct vents are not interchangeable with splash or fine-dust protection.
• OTG (over-the-glasses) safety glasses/goggles — sized to fit over prescription eyewear, a real but imperfect fix per forum sourcing (fit and seal complaints are common) [R-SMC3].
• Prescription safety glasses / safety inserts — corrective lenses ground to the standard, or a separate insert behind a safety frame; several practitioners adopted them after OTG models failed to seal or distorted their vision [R-SMC3].
• Face shield (companion, secondary) — worn over spectacles or goggles for impact and over goggles for splash; never the primary eye protection for impact.

trades

Woodworking — the corpus's primary trade; lathe turning is the operation the practitioner sourcing most often ties to serious injury, which is why guards and position come before PPE. Metalworking/grinding — wire-wheel and bench or angle grinder work, the source of the most severe reported injury in the sourcing (a lost eye). Construction — nail-gun ricochet is a hazard but no account was read [search-synthesis]. Heavy industry (historical origin) — furnace and puddling work, the trade Powell Johnson's 1880 glare-protector patent addressed [R3].

lineage

Ancestors.

• Inuit and other Arctic snow goggles — an ancestor for eye protection generally, for glare, UV and snow-blindness rather than impact. Two museum objects were read by the original run: Smithsonian NMNH "Snow Goggles," record nmnhanthropology_8480283 (accessioned January 7, 1869, donor Roderick R. MacFarlane, Inuvialuit culture, Northwest Territories; the record shows a curatorial correction from "ringed seal" skin to wolverine skin by the museum's collection manager) [R1]; and Science Museum Group (UK) / Wellcome Collection, "Wooden snow goggles, with single slit," object A300765 (conifer wood and sinew, 120 mm, a single narrow slit that narrows the visual field to cut glare) [R2]. Snow goggles are widely dated to roughly 2,000 years of use, but no single dated excavation source was fetched; carried as search-corroborated [search-synthesis].
• Powell Johnson's "Eye-Protector," US Patent 234,039, granted November 2, 1880. Powell Johnson, of Barton, Colbert County, Alabama, a Black inventor, patented a two-hoop frame holding cloth disks, with side pieces and a clasp, "for use of furnace-men, puddlers, firemen, and others exposed to glare of strong light, as well as persons of weak sight" (a small hole in the disks is a described modification for the latter). The patent, re-read in this pass, makes no transparent-lens, projectile-resistance, safety-test or impact claim, and its own text shows earlier spectacle art. It is kept here as a documented 1880 industrial glare-protector patent and an important Black-inventor record, not as the founding patent or direct origin of impact-rated safety glasses; no evidence of technical or documentary continuity between it and modern impact eyewear is claimed [R3].
• Julius King Optical Co. / American Optical "SANIGLAS," 1909 — search-corroborated across secondary sources (trade-press retrospectives, vintage-eyewear dealer listings) as an early impact-protective safety goggle; American Optical acquired Julius King Optical in 1923. No patent number was located. This rests on search synthesis and Wikipedia-tier company history, not manufacturer proof [search-synthesis].

Descendants / standards lineage.

• NBS Handbook H2 / the Z2 standard, 1922 — a joint War and Navy Department and National Bureau of Standards cooperative safety-standards effort, described as an ancestor of the ANSI series [search-synthesis].
• USA Standard Z87.1-1968, approved September 18, 1968, superseding the 1959 Z2 edition; renamed ANSI Z87.1 after USASI became ANSI in October 1969 [search-synthesis].
• Later editions: 1979, 1989, 2003, 2010, 2015, 2020, 2025 (the current consensus edition, ANSI/ISEA Z87.1-2025). These are different statements from the legal one: OSHA 29 CFR 1910.133, read in this pass, accepts devices complying with ANSI/ISEA Z87.1-2010, ANSI Z87.1-2003 or ANSI Z87.1-1989 (R-1998), or shown to be at least as effective [R4]. "Current edition" and "OSHA-incorporated edition" are not the same thing.
• The + / Z87+ impact marking addresses the high-mass and high-velocity impact tests in the standard. This entry does not say why the committee adopted it; the practitioner threads below illustrate hazards but do not establish standards-committee reasoning.

Contemporaries. The face shield, always a paired, secondary layer over spectacles or goggles for impact; and safety goggles, the fitted sibling selected for dust and splash (see matching).

history

Key evolutions (each addressing a named limitation — Petroski lens).

• A shade that blocks light → a hinged, wearable frame (Powell Johnson, 1880). The patent's frame form factor, with a flip-away outer shade, addressed glare and heat for furnace work. It is a glare device and does not claim impact protection [R3].
• Glare protection → impact-protective goggles (SANIGLAS, 1909). Secondary sources describe a shift to goggles built to survive a mechanical strike. The specific triggering injury event was not located [search-synthesis]. This is a change of function, and no technical descent from Johnson's patent is shown.
• Manufacturer-specific claims → a single national test standard (Z2/NBS Handbook H2, 1922; ANSI Z87.1, 1968). Before a common standard, "safety glasses" was a manufacturer's marketing claim; a conformity marking now states compliance with a standard. It does not by itself prove that an accredited third party tested that particular product [search-synthesis; ANSI states it is not a certification body, see References].
• Glass lenses → impact-resistant plastics. CR-39 was developed at PPG Industries in 1940 for a WWII B-17 bomber fuel-tank application and adapted to eyewear by Signet Armorlite in 1947. Polycarbonate was independently discovered by Hermann Schnell at Bayer and Daniel Fox at GE Plastics in 1953, each filing a 1955 patent; Bayer commercialized as Makrolon (1958), GE as Lexan (1960) [search-synthesis]. NIOSH's 1977 report, "Tests of Plastic Plano Safety Spectacles" (Collins and Wolfe, DHEW/NIOSH Publication No. 78-108), describes tests of seventeen plastic-lensed spectacle models advertised as meeting ANSI Z87.1, so plastic safety lenses were already a multi-manufacturer commercial category by 1977 [R5]. That glass-lens injuries drove ANSI revisions toward polycarbonate is asserted by secondary sources but is not tied to a primary standards document; it is the weakest link in this history.
• A basic marking → a high-impact marking (Z87+). A practitioner (Michael Mills, Sawmill Creek) gave a plain-language account of why the base drop-ball test was judged insufficient for real shop hazards [R-SMC1]. The test values he quoted are not used here; see correct use for the values from NIOSH and 3M.

✦ human side

The people this tool belongs to. Every trade generating flying debris as a byproduct of its own work: woodworkers turning on a lathe, grinding metal, and running a table saw; metalworkers and machinists; construction trades using nail guns; and, in the tool's own origin, furnace-men and puddlers exposed to industrial glare and heat a century and a half ago.

A named historical figure. Powell Johnson's 1880 patent is a documented industrial glare-protector patent and an important Black-inventor record; it is not evidence for impact-rated safety eyewear (see lineage). It is not a priority claim: the patent itself shows earlier spectacle prior art, and what a research pass has or has not read is a boundary of the research, not of history [R3].

Named practitioners (forum threads, read by the original run; they illustrate hazards and are not evidence of standards history or of injury rates). Five forum threads (The Garage Journal and four woodturning/woodworking forums):

• On The Garage Journal's "Had a very close call...Wear your safety glasses guys" (2017, read in full), the OP (JohnDeere1) describes a wire-wheel bristle from an angle die grinder stabbing 7mm into the corner of his eye, leaving him temporarily unable to open it. Named user 1961MGA recounts a shop maintenance worker who pulled the trigger on a wire-wheel-fitted air grinder with zero eye protection "just to test it" and "ended up with a wire in the center of his pupil, and lost that eye." Named user davethorik describes a metal fragment that passed his safety glasses during pencil-grinder deburring; by the time he sought care his cornea had already grown around the sliver, which had begun to rust before an ophthalmologist extracted it — a permanent hazy spot remains. Named user Provincial reports grinder shrapnel ricocheting off the inside back of his own full face shield and into his eye — twice — a documented case of the shield itself becoming a secondary bounce surface rather than a pure barrier [R-GJ].
• On Sawmill Creek's "plexi-glass shield and guard for wood lathe" (2018, read in full), named turner Kyle Iwamoto reports being hit in the eye by a shard that bounced off his own smock under his face shield — debris entering from below, not through the shield — while wearing glasses is what prevented injury. The thread's own extended debate over whether a given lathe guard is genuine polycarbonate/Lexan or shatter-prone acrylic ("Plexiglas") is a real, documented material-substitution trap [R-SMC2].
• On AAWForum's "mandatory use of face shields" (2010, read in full), named AAW forum expert john lucas states plainly: "I don't think anyone should demo without at least a pair of safety glasses, even small stuff... I had an old wooden faceplate blow up on me a few weeks ago," and separately names a club president who turns at high speed with no eye protection at all. Named turner robo hippy (Reed Gray) states that typical turning face shields "have almost no impact resistance" and exist mainly to keep chips off the face — direct practitioner evidence that a shield is not a substitute for rated glasses underneath. Named turner Russ Fairfield explains he wears safety glasses under a face shield for demonstrations specifically "because they have side shields, and bridge the nose gap" [R-AAW1].
• On AAWForum's "levels of face protection at the lathe" (2014, read in full), named turners Odie and Fred Belknap describe a Uvex Bionic face shield developing visible "starburst" impact marks — "like a gravel makes when it hits a windshield" — after repeated small-debris strikes, one practitioner observation of lens degradation after repeated small-debris strikes; it is not an established, category-wide stress-concentration mechanism, and the manufacturer's own cleaning and replacement directions govern [R-AAW2].
• On Sawmill Creek's "Safety glasses" (2010, read in full), OP Jaze Derr (small head, strong prescription) reports his safety glasses "don't even pretend to protect from sawdust," his eyes smarting for a day afterward. Named user Matt Mackinnon replies directly: "Safety glasses were never designed to protect against dust particles. They are there for shards or fast moving debris." Named user glenn bradley notes that "no doctor will put safety lenses in regular frames," recommending genuine side-shielded or OTG designs instead [R-SMC3].

Honest gap. No named, dated nail-gun-ricochet eye injury account was read; only a paywalled case report and CDC/NIOSH survey metadata were located via search [search-synthesis, unconfirmed].

✦ proof of existence

Earliest dated wearable eye-protection patent read by this corpus: US Patent 234,039, "Eye-Protector," Powell Johnson, of Barton, Colbert County, Alabama, granted November 2, 1880. Its text describes cloth-disk protection against intense light and weak sight and makes no impact claim; the patent itself shows earlier spectacle art, so "earliest read" is a research boundary and not historical priority. A Washington State Department of Labor & Industries retrospective and secondary accounts corroborate patentee, date and location (original run). Google lists one later citing patent, US2,639,429 (1953); a single citation is not evidence of influence on safety eyewear [R3].

Museum/collection records (read by the original run): Smithsonian NMNH, "Snow Goggles," nmnhanthropology_8480283, with a visible curatorial correction from seal to wolverine skin [R1]; Science Museum Group (UK) / Wellcome Collection, "Wooden snow goggles, with single slit," A300765 [R2].

Regulatory record: OSHA 29 CFR 1910.133, re-read in this pass: the general duty to provide appropriate eye or face protection, side protection for flying-object hazards, prescription accommodation, and compliance via ANSI/ISEA Z87.1-2010, ANSI Z87.1-2003 or ANSI Z87.1-1989 (R-1998), or equally effective protection; the original run also noted a Federal Register amendment history (59 FR 16360 and 33910, 1994; 61 FR 9227 and 19547, 1996; 74 FR 46356, 2009; 81 FR 16090, 2016) [R4]. ANSI/ISEA Z87.1-2025 is the current consensus edition [R6].

A 1977 NIOSH test report: Collins RL and Wolfe RS Jr., "Tests of Plastic Plano Safety Spectacles," NIOSH/DHEW Publication No. 78-108; the original run read its record and abstract via CDC Stacks (stacks.cdc.gov/view/cdc/209323), which describe penetration, impact, luminous-transmittance, flammability, refractive-power and corrosion tests on seventeen plastic-lensed models advertised as meeting ANSI Z87.1; the full PDF was not read [R5].

Manufacturer histories (self-history, not independent proof): Uvex — founded 1926 in Fürth by Philipp M. Winter; the brand name coined in 1956 by Rainer Winter as a contraction of "UltraViolet EXcluded" [R7]. Bollé Safety — founded 1888 in Oyonnax, France (originally combs); first safety glasses and goggles in 1950 [R8]. American Optical — founded 1833 in Southbridge, Massachusetts; its industrial-safety line traces through the 1923 Julius King acquisition to the AOSafety brand, divested by Warner-Lambert in 1982 and under 3M since the 2008 Aearo acquisition; this corporate chain comes from Wikipedia, a third-party source, and is not manufacturer proof [R9].

Not located: the Julius King 1909 SANIGLAS patent number; any early-1900s impact-rated (not glare-only) safety-goggle patent. Candidates surfaced in Google Patents' citation graph (US1,097,198 1914; US1,103,118 1914; US1,223,076 1917) and were not opened.

references

• [R1] Smithsonian NMNH, "Snow Goggles," object record nmnhanthropology_8480283 — read by the original run (si.edu).
• [R2] Science Museum Group (UK) / Wellcome Collection, "Wooden snow goggles, with single slit," object A300765 — read by the original run (collection.sciencemuseumgroup.org.uk).
• [R3] US Patent 234,039, "Eye-Protector," Powell Johnson, Barton, AL, granted November 2, 1880 — read in the fix pass; secondary corroboration from a Washington State L&I retrospective (original run).
• [R4] OSHA 29 CFR 1910.133, Eye and face protection — re-read in the fix pass.
• [R5] Collins RL and Wolfe RS Jr., "Tests of Plastic Plano Safety Spectacles," NIOSH/DHEW Publication No. 78-108, 1977 — bibliographic record and abstract read by the original run via CDC Stacks; the full 22-page PDF was not read.
• [R6] ANSI/ISEA Z87.1-2025 overview — original run; supports the current edition and marking families, not Z87 alone as every hazard's selection rule.
• [R7] Uvex group's own company history page — company self-history (uvex-group.com), read by the original run.
• [R8] Bollé Safety's own heritage page — company self-history (bolle-safety.com), read by the original run.
• [R9] American Optical Company — via Wikipedia (a third-party source, not company-published).
• [R-GJ] The Garage Journal, "Had a very close call...Wear your safety glasses guys" (2017) — read by the original run; named contributors JohnDeere1, 1961MGA, davethorik, Provincial, 619DioFan, ChaseDE quoted by forum username.
• [R-SMC1] Sawmill Creek, "Safety glasses" (2010) — read by the original run; named contributors Jaze Derr, Matt Mackinnon, glenn bradley, Michael Mills, Bill Boehme quoted by forum username. (Note: Michael Mills' and Bill Boehme's Z87+ test-spec and concussion posts appear in this thread.)
• [R-SMC2] Sawmill Creek, "plexi-glass shield and guard for wood lathe" (2018) — read by the original run; named contributors Kyle Iwamoto, Sam Beagle, Barry McFadden quoted by forum username.
• [R-SMC3] Sawmill Creek, "Safety glasses" (2010) — see R-SMC1; used here for the OTG/prescription/dust-limitation material.
• [R-AAW1] AAWForum, "mandatory use of face shields" (2010) — read by the original run; named contributors john lucas, robo hippy (Reed Gray), Russ Fairfield, Bart Leetch quoted by forum username.
• [R-AAW2] AAWForum, "levels of face protection at the lathe" (2014) — named contributors Odie, Fred Belknap quoted by forum username.
• [N1] NIOSH, "The Manufacture and Selection of Eye Protection at Work" — read in the fix pass: Z87 versus Z87+, materials, lens retention, 1.1-lb high-mass example, fit, side coverage.
• [N2] NIOSH Eye Protection toolbox talk — Z87+ advice relayed from the reviewer; fetch failed.
• [O1] OSHA Field Safety and Health Management System, Chapter 8 — read in the fix pass: selection tables for impact, D3, D4, D5, face shields, fit and compatibility.
• [O2] OSHA Subpart I Appendix B — relayed from the reviewer; not read.
• [O3] OSHA Woodworking Lathe eTool — read in the fix pass: lathe guarding and work practices.
• [M1] 3M 1611 Protective Eyewear Use Instructions — read in the fix pass: limited protection, exclusion of fragmenting wheels, guards, face shields, inspection.
• [M2] 3M Eye Protection product guide — read in the fix pass: 150 ft/s spectacles, 250 ft/s goggles, 500-g pointed projectile.
• [A1] ANSI standardization FAQ — read in the fix pass: ANSI "is not a certification body and does not certify any product, process, service, person, or management system"; certification is by bodies accredited by ANAB.

Forge image needs (logged directly per the standing 2026-09-02 pause on Forge ticket-filing)

• Anatomy diagram — an open-frame Z87 spectacle side-by-side with a sealed goggle, labeled to show the side shield, seal/gasket, and venting differences (direct, indirect, non-vented) that D3, D4 and D5 matching turns on.
• Z87 vs. Z87+ marking comparison graphic — the lens/frame embossment itself, plus a simple side-by-side of what each marking means, with test values drawn only from the applicable edition and the protector type (spectacle or goggle), since the distinction is one of the entry's most actionable findings.
• Layered-protection diagram for lathe/grinder work — glasses worn under a face shield, illustrating the two independent documented failure modes (debris bouncing off the inside of a shield; debris entering from below a shield) that make this a paired-layer rule, with the guards and workholding that come first shown beside it.

The reviewer's corrections (8)

• BLOCKER — 1. Do not select plain Z87 eyewear as the impact default — Exact claim: “Basic impact-rated safety glasses (Z87) ... the everyday shop default; passes the 1-inch steel-ball drop test,” plus “routine shop dust and light chip exposure calls for basic Z87 glasses.”
• BLOCKER — 2. Correct dust and splash matching — Exact claim: “any operation generating chips, sparks, or dust — sawing, routing, planing, chiseling, sanding — calls for basic Z87 glasses at minimum.”
• BLOCKER — 3. Remove the catastrophic-impact guarantee and restore upstream controls — Exact claim: “Stopping ... a lathe blank's catastrophic failure” and “lathe turning, bench/angle grinding, wire-wheel work, and nail-gun use call for Z87+ glasses plus a face shield.”
• SHOULD-FIX — 4. Correct the Z87+ test description — Exact claim: “a pointed 1.4-lb object from the same height, plus a ¼-inch steel ball at roughly 100 mph.”
• SHOULD-FIX — 5. Remove unsupported certification language — Exact claim: safety spectacles are “built and independently tested,” and “only a Z87-marked frame and lens have been independently tested.”
• SHOULD-FIX — 6. Separate impact performance from lens material — Exact claim: “now near-universally polycarbonate ... chosen specifically because it does not shatter into shards the way glass does under impact.”
• SHOULD-FIX — 7. Reframe the Powell Johnson patent and historical priority — Exact claim: “a founding patent (US 234,039, Powell Johnson, 1880)” and “the earliest independently-read wearable eye-protection patent this corpus has found ... a genuine ... origin point.”
• MINOR — 8. Remove unsupported causal history and process residue — Exact claim: Z87+ was “added to address exactly” lathe blanks, wire-wheel bristles, and grinder fragments; plus repeated statements about what “this run,” research passes, the sibling entry, and the corpus have found.