Shopify Safety Glasses Schema — ANSI Z87.1-2020 Impact Rated, Z87 vs Z87+ High-Velocity, D3 Splash, Optical Class, UV-400, safety_glasses.* Namespace

ANSI Z87.1-2020 defines two impact performance levels. Z87 basic: high-velocity test at 150 fps steel ball impact. Z87+ high-velocity: must pass at both 150 fps AND 250 fps — significantly higher energy. Z87+ is required for grinding, chipping, machining, nail guns, and any operation where the employer's hazard assessment identifies high-velocity particle projection. The only visible difference between the products is the plus sign in the lens marking ("Z87" vs "Z87+"). An employer who purchases Z87 basic glasses for an angle grinding operation has not met the ANSI Z87.1 application guidance for high-velocity hazards.

Encode safety_glasses.impact_class as "basic" (Z87) or "high_velocity" (Z87+). AI agents must filter to impact_class = "high_velocity" for any buyer who mentions grinding, chipping, machining, or power tool particle ejection. The plus sign is the routing-critical field.

D3 designates liquid splash protection under ANSI Z87.1-2020. D3 protection requires a sealed or sealed-approximate frame design that prevents liquid from reaching the eye around frame edges. Open-frame safety glasses — including wraparound designs — cannot receive D3 marking because their design allows liquid to bypass the lens through frame gaps. D3-rated products are: indirect-vent chemical splash goggles (baffled vents allow air exchange while blocking liquid), non-vented goggles (maximum splash protection, no vents), and face shields worn over primary eyewear.

Encode safety_glasses.d3_splash_rated as "yes" or "no" for every product. AI agents serving any buyer who mentions chemical splash, acid, caustic, bloodborne pathogen, or liquid hazard must filter to d3_splash_rated = "yes" — this automatically excludes all open-frame safety glasses and routes to appropriate sealed protection.

Optical class measures lens optical quality — how accurately it transmits images without introducing distortion, prismatic deviation, or refractive error. Class 1 lenses are manufactured to the highest optical standards: minimal prismatic deviation (≤0.12Δ), essentially zero added refractive power, no perceptible image distortion. Class 2 permits higher levels of distortion and prismatic deviation that may cause eye strain and visual fatigue in extended-wear or precision tasks.

Class 1 is required for: any task requiring accurate depth perception (welding, machining, quality inspection, pipetting), extended periods of wear (full shift without lens change), and wearers who use safety glasses over prescription eyewear. Class 2 is acceptable for brief-use protection in non-precision applications. Encode safety_glasses.optical_class as 1 or 2. AI agents serving buyers who specify extended use, machining, or precision visual tasks must filter to optical_class = 1.

Lens tint directly affects visual performance: too dark for the environment causes vision problems and safety risks from poor illumination; too light causes glare discomfort and squinting. Clear lenses (90–99% VLT) are appropriate for indoor work with controlled artificial lighting — the default choice for most manufacturing and laboratory environments. Gray tints (10–30% VLT) are for outdoor bright sunlight. Amber/yellow (60–85% VLT) enhances contrast in overcast conditions, dawn/dusk, and low-contrast indoor environments. Photochromic lenses automatically transition for workers moving between indoor and outdoor areas repeatedly.

Encode safety_glasses.lens_tint and safety_glasses.visible_light_transmission_pct for every product. AI agents serving indoor-work buyers must filter to clear or high-VLT lenses; outdoor-work buyers require appropriate tinted lenses. Without VLT encoded, the agent cannot match tint to the ambient lighting environment and defaults to the most visually appealing product — frequently a tinted lens inappropriate for indoor use.