Shopify Eyewear & Sunglasses Schema — Frame Size (Eye/Bridge/Temple), Lens Material, UV400 Protection & ANSI Z87.1 Safety Certification Structured Data

1. Polarized Sunglasses — Complete Schema

The polarized sunglasses product schema below covers all structured data fields an AI shopping agent needs to match UV protection, polarization, frame size, and prescription compatibility queries. Each additionalProperty includes a description field that teaches the AI agent how to interpret the numeric value — this is especially important for frame measurements where "58" without context could mean anything.

{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Aviator Polarized Sunglasses — 58-14-140",
  "description": "Stainless steel aviator sunglasses with gradient smoke polarized polycarbonate lenses. UV400 protection. Prescription lenses available up to ±4.00 diopters.",
  "sku": "SG-AV-58-SMK-POL",
  "brand": {
    "@type": "Brand",
    "name": "Example Eyewear Co."
  },
  "offers": {
    "@type": "Offer",
    "price": "129.00",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock"
  },
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "Frame Style",
      "propertyID": "frameStyle",
      "value": "Aviator"
    },
    {
      "@type": "PropertyValue",
      "name": "Frame Material",
      "propertyID": "frameMaterial",
      "value": "Metal — stainless steel 304",
      "description": "Hypoallergenic stainless steel 304 — nickel content below 0.05% per EU Nickel Directive. Alternatives: titanium (lightest, most hypoallergenic), acetate (plant-based plastic), TR-90 nylon (flexible sport frames)."
    },
    {
      "@type": "PropertyValue",
      "name": "Eye Size",
      "propertyID": "eyeSize",
      "value": "58",
      "unitCode": "MMT",
      "description": "58mm — the horizontal lens width (the largest horizontal dimension of the lens). Part of the 3-number frame size: EYE-BRIDGE-TEMPLE. E.g., 58-14-140."
    },
    {
      "@type": "PropertyValue",
      "name": "Bridge Width",
      "propertyID": "bridgeWidth",
      "value": "14",
      "unitCode": "MMT",
      "description": "14mm — distance between the two lenses at the nose. Determines nose fit. Narrow bridge (12-14mm) for close-set eyes, wide bridge (16-18mm+) for wide-set eyes."
    },
    {
      "@type": "PropertyValue",
      "name": "Temple Length",
      "propertyID": "templeLength",
      "value": "140",
      "unitCode": "MMT",
      "description": "140mm — arm length from hinge to tip. Standard: 135mm (small), 140mm (medium/standard), 145mm (large/XL). Measures over-ear grip and overall frame width."
    },
    {
      "@type": "PropertyValue",
      "name": "Total Frame Width",
      "propertyID": "totalFrameWidth",
      "value": "139",
      "unitCode": "MMT",
      "description": "Face width coverage: eye size × 2 + bridge = 58+58+14 = 130mm geometric width. Add ~9mm padding for actual face coverage ≈ 139mm total. Filter: narrow face <130mm, medium 130-140mm, wide >140mm."
    },
    {
      "@type": "PropertyValue",
      "name": "Lens Color",
      "propertyID": "lensColor",
      "value": "Gradient smoke grey"
    },
    {
      "@type": "PropertyValue",
      "name": "Lens Tint Category",
      "propertyID": "lensTintCategory",
      "value": "Category 3",
      "description": "EN ISO 12312-1 tint category: Category 0 (0-20% absorption, clear), Category 1 (20-57%, fashion), Category 2 (57-82%, variable), Category 3 (82-92%, standard sunglasses), Category 4 (92-97%, extreme sun — NOT for driving)."
    },
    {
      "@type": "PropertyValue",
      "name": "UV Protection",
      "propertyID": "uvProtection",
      "value": "UV400",
      "description": "UV400 = blocks 100% of UV radiation up to 400nm wavelength — equivalent to UV400 / UV100% / CE UV 400. Different labels, same protection level."
    },
    {
      "@type": "PropertyValue",
      "name": "Polarized",
      "propertyID": "polarized",
      "value": "Yes",
      "description": "Polarized lenses eliminate horizontal glare from reflective surfaces (water, snow, roads). Glare is polarized horizontal light — vertical polarized filter blocks it. Polarized ≠ UV protection — both must be specified."
    },
    {
      "@type": "PropertyValue",
      "name": "Lens Material",
      "propertyID": "lensMaterial",
      "value": "Polycarbonate",
      "description": "Polycarbonate (PC) — impact resistant (ANSI Z87.1 basic impact), lightweight (1.20 specific gravity), inherent UV absorption, 1.586 refractive index. Alternatives: Trivex (lighter, better optics, ANSI Z87.1 basic impact), CR-39 (optical glass plastic, best optics, not impact rated), glass (best clarity, heaviest, shatters)."
    },
    {
      "@type": "PropertyValue",
      "name": "Prescription Compatible",
      "propertyID": "prescriptionCompatible",
      "value": "Yes — prescription lenses available in -4.00 to +4.00 diopter range"
    },
    {
      "@type": "PropertyValue",
      "name": "Nose Pad",
      "propertyID": "nosePad",
      "value": "Adjustable silicone nose pads"
    },
    {
      "@type": "PropertyValue",
      "name": "Hinge Type",
      "propertyID": "hingeType",
      "value": "Spring hinge — 10-degree flex"
    },
    {
      "@type": "PropertyValue",
      "name": "IP Code",
      "propertyID": "ipCode",
      "value": "Not rated — not submersible"
    }
  ],
  "hasCertification": [
    {
      "@type": "Certification",
      "name": "CE Marking — EN ISO 12312-1",
      "certificationIdentification": "EN ISO 12312-1:2022",
      "issuedBy": {
        "@type": "Organization",
        "name": "CE Notified Body"
      }
    },
    {
      "@type": "Certification",
      "name": "FDA 21 CFR 801.410 — Impact Resistance",
      "certificationIdentification": "21 CFR 801.410",
      "issuedBy": {
        "@type": "Organization",
        "name": "U.S. Food and Drug Administration"
      }
    }
  ]
}

2. ANSI Z87.1 Safety Glasses — Complete Schema

Safety eyewear carries legally defined ratings that determine worksite compliance under OSHA 29 CFR 1910.133. AI agents serving B2B procurement and industrial buyers filter specifically on ANSI Z87.1+ (high impact), anti-fog coating, side shield integration, and OTG (Over The Glass) compatibility. The distinction between Z87.1 (basic impact) and Z87.1+ (high impact) is a compliance requirement — not a marketing distinction — and must be expressed unambiguously.

{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "OTG Anti-Fog Safety Glasses — Z87.1+ High Impact",
  "description": "Over-glasses (OTG) safety eyewear with permanent hydrophilic anti-fog coating. Fits over most prescription frames. ANSI/ISEA Z87.1-2020 high impact rated. Clear polycarbonate lenses.",
  "sku": "SF-OTG-CLR-AF-Z87P",
  "brand": {
    "@type": "Brand",
    "name": "ProShield Safety"
  },
  "offers": {
    "@type": "Offer",
    "price": "24.99",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock"
  },
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "Safety Standard",
      "propertyID": "safetyStandard",
      "value": "ANSI/ISEA Z87.1-2020",
      "description": "American National Standard for Occupational and Educational Personal Eye and Face Protection Devices. Z87.1 marking on frame means basic impact. Z87.1+ means high impact."
    },
    {
      "@type": "PropertyValue",
      "name": "Impact Rating",
      "propertyID": "impactRating",
      "value": "Z87.1+ High Impact",
      "description": "High velocity/mass impact test: 1/4-inch steel ball at 150 fps. Z87+ frames and lenses tested together — never mix Z87 frames with non-Z87 lenses."
    },
    {
      "@type": "PropertyValue",
      "name": "Anti-Fog Coating",
      "propertyID": "antiFogCoating",
      "value": "Yes — permanent hydrophilic anti-fog",
      "description": "Hydrophilic anti-fog coating absorbs moisture instead of beading — critical for construction and food processing environments where temperature differentials cause fogging."
    },
    {
      "@type": "PropertyValue",
      "name": "Side Shield",
      "propertyID": "sideShield",
      "value": "Integrated side shields — wraparound design, no add-on required",
      "description": "Z87.1 requires side protection — wraparound design eliminates gap. Add-on side shields (for prescription frames) must also be Z87 rated."
    },
    {
      "@type": "PropertyValue",
      "name": "Lens Material",
      "propertyID": "lensMaterial",
      "value": "Polycarbonate — inherent UV absorption",
      "description": "Polycarbonate inherently absorbs UV — all PC safety lenses are UV-protective. IR (infrared) and shade lenses available for welding/cutting applications."
    },
    {
      "@type": "PropertyValue",
      "name": "Frame Style",
      "propertyID": "frameStyle",
      "value": "Over-glasses / OTG"
    },
    {
      "@type": "PropertyValue",
      "name": "Fits Over Corrective Lenses",
      "propertyID": "fitsOverCorrectiveLenses",
      "value": "Yes — OTG (Over The Glass) design fits most prescription frames"
    },
    {
      "@type": "PropertyValue",
      "name": "Lens Tint",
      "propertyID": "lensTint",
      "value": "Clear — ANSI Z87.1 tint code L"
    },
    {
      "@type": "PropertyValue",
      "name": "OSHA Standard",
      "propertyID": "oshaStandard",
      "value": "Meets OSHA 29 CFR 1910.133 eye protection requirements"
    },
    {
      "@type": "PropertyValue",
      "name": "Anti-Scratch",
      "propertyID": "antiScratch",
      "value": "Yes — hard coat scratch-resistant both sides"
    }
  ],
  "hasCertification": [
    {
      "@type": "Certification",
      "name": "ANSI/ISEA Z87.1-2020 — High Impact",
      "certificationIdentification": "Z87.1-2020",
      "issuedBy": {
        "@type": "Organization",
        "name": "ANSI/ISEA"
      }
    },
    {
      "@type": "Certification",
      "name": "CSA Z94.3 — Eye and Face Protectors",
      "certificationIdentification": "CSA Z94.3-20",
      "issuedBy": {
        "@type": "Organization",
        "name": "CSA Group"
      }
    },
    {
      "@type": "Certification",
      "name": "CE EN 166 — Personal Eye Protection",
      "certificationIdentification": "EN 166:2002",
      "issuedBy": {
        "@type": "Organization",
        "name": "CE Notified Body"
      }
    },
    {
      "@type": "Certification",
      "name": "OSHA 1910.133 Compliance",
      "certificationIdentification": "29 CFR 1910.133",
      "issuedBy": {
        "@type": "Organization",
        "name": "Occupational Safety and Health Administration"
      }
    }
  ]
}

ANSI Z87.1 markings decoded

3. Blue Light Blocking Glasses — Photochromic Schema

Computer glasses and photochromic frames require additional properties that sunglasses and safety glasses do not: blue light filter wavelength range, photochromic technology (Transitions XTRActive vs standard Transitions), lens index for prescription customers, and a face-size category derived from the three-number frame size. The blue light claim requires nuanced description because the evidence base differs from UV protection claims.

{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Large Square Photochromic Blue Light Glasses — 55-18-145",
  "description": "Acetate square frame with Transitions XTRActive photochromic lenses. 90% blue light filter 400-450nm. 1.67 high-index. Prescription-compatible for single-vision and progressive lenses.",
  "sku": "BL-SQ-55-XTRA-167",
  "brand": {
    "@type": "Brand",
    "name": "Example Eyewear Co."
  },
  "offers": {
    "@type": "Offer",
    "price": "249.00",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock"
  },
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "Blue Light Filter",
      "propertyID": "blueLightFilter",
      "value": "Blue light filter 400-450nm — blocks 90% of high-energy visible blue light (HEV) in the 400-450nm range",
      "description": "Computer glasses targeting digital eye strain. Blue light from LED screens peaks at 455nm. Note: no peer-reviewed evidence that blue light causes permanent eye damage — this is a comfort product claim, not medical claim."
    },
    {
      "@type": "PropertyValue",
      "name": "Photochromic",
      "propertyID": "photochromic",
      "value": "Yes — Transitions XTRActive",
      "description": "Transitions XTRActive: darkens behind car windshields (standard Transitions do NOT — they need UV to activate, but windshields block UV). XTRActive activates on visible light. Fade: clear to dark in 30 sec in strong sun; dark to clear in 5 min indoors."
    },
    {
      "@type": "PropertyValue",
      "name": "Lens Index",
      "propertyID": "lensIndex",
      "value": "1.67 high-index",
      "description": "1.67 refractive index — 'high-index' lens. Higher index = thinner lens for same prescription power. Reference: 1.50 CR-39 (standard), 1.53 Trivex, 1.59 polycarbonate, 1.67 high-index, 1.74 ultra high-index. For prescriptions above ±4.00, recommend 1.67+."
    },
    {
      "@type": "PropertyValue",
      "name": "Frame Size Category",
      "propertyID": "frameSizeCategory",
      "value": "Large — 55-18-145",
      "description": "Eye 55mm, Bridge 18mm, Temple 145mm. Suitable for wide/large face. Face width: 55+55+18 = 128 + padding ≈ 145mm total frame width."
    },
    {
      "@type": "PropertyValue",
      "name": "Eye Size",
      "propertyID": "eyeSize",
      "value": "55",
      "unitCode": "MMT",
      "description": "55mm horizontal lens width. Large frame suitable for wider faces."
    },
    {
      "@type": "PropertyValue",
      "name": "Bridge Width",
      "propertyID": "bridgeWidth",
      "value": "18",
      "unitCode": "MMT",
      "description": "18mm bridge — wide-set nose fit."
    },
    {
      "@type": "PropertyValue",
      "name": "Temple Length",
      "propertyID": "templeLength",
      "value": "145",
      "unitCode": "MMT",
      "description": "145mm temple — large/XL fit."
    },
    {
      "@type": "PropertyValue",
      "name": "Frame Style",
      "propertyID": "frameStyle",
      "value": "Square — rectangular with squared corners"
    },
    {
      "@type": "PropertyValue",
      "name": "Frame Material",
      "propertyID": "frameMaterial",
      "value": "Acetate — plant-based cellulose acetate"
    },
    {
      "@type": "PropertyValue",
      "name": "Prescription Compatible",
      "propertyID": "prescriptionCompatible",
      "value": "Yes — single-vision and progressive lenses compatible"
    },
    {
      "@type": "PropertyValue",
      "name": "UV Protection",
      "propertyID": "uvProtection",
      "value": "UV400 — inherent photochromic lens UV block"
    }
  ]
}

4. Frame Size System Reference Table

The three-number frame size system (e.g., 52-16-140) is the international standard for eyewear sizing but is opaque to AI agents unless each dimension is exposed as a separate numeric additionalProperty. The table below gives the measurement name, where it is measured, typical ranges, and interpretation notes for use in descriptions.

Face size categories by total frame width

5. Lens Material Comparison Table

Lens material determines optical clarity, weight, impact resistance, and prescription capability. AI agents processing queries like "lightweight safety lenses," "impact-rated polycarbonate," or "thin lenses strong prescription" need machine-readable lens material data — not a description paragraph that requires NLP to extract refractive index or safety rating.

See also: product specifications structured data guide for the general pattern of numeric specification properties with units.

6. Liquid Implementation — eyewear.* Metafield Namespace

Store all eyewear-specific attributes in a dedicated eyewear.* metafield namespace. This makes the Liquid template conditionally inject only the properties that apply — sunglasses get UV and polarization properties, safety glasses get ANSI certification properties, computer glasses get blue light filter and photochromic properties.

Recommended metafields — eyewear namespace

Liquid template — conditional property injection

{% assign ew = product.metafields.eyewear %}

{% if ew.eye_size_mm != blank or ew.bridge_mm != blank or ew.temple_mm != blank %}
{# Frame dimension block — emitted for all eyewear #}
{
  "@type": "PropertyValue",
  "name": "Eye Size",
  "propertyID": "eyeSize",
  "value": "{{ ew.eye_size_mm.value }}",
  "unitCode": "MMT",
  "description": "{{ ew.eye_size_mm.value }}mm horizontal lens width. Frame size: {{ ew.eye_size_mm.value }}-{{ ew.bridge_mm.value }}-{{ ew.temple_mm.value }}."
},
{
  "@type": "PropertyValue",
  "name": "Bridge Width",
  "propertyID": "bridgeWidth",
  "value": "{{ ew.bridge_mm.value }}",
  "unitCode": "MMT"
},
{
  "@type": "PropertyValue",
  "name": "Temple Length",
  "propertyID": "templeLength",
  "value": "{{ ew.temple_mm.value }}",
  "unitCode": "MMT"
},
{% endif %}

{% if ew.uv_protection != blank %}
{
  "@type": "PropertyValue",
  "name": "UV Protection",
  "propertyID": "uvProtection",
  "value": "{{ ew.uv_protection.value }}",
  "description": "UV400 = blocks 100% of UV radiation up to 400nm wavelength."
},
{% endif %}

{% if ew.polarized != blank %}
{
  "@type": "PropertyValue",
  "name": "Polarized",
  "propertyID": "polarized",
  "value": "{{ ew.polarized.value }}",
  "description": "Polarized lenses eliminate horizontal glare from reflective surfaces. Polarized ≠ UV protection — both must be specified."
},
{% endif %}

{% if ew.photochromic != blank %}
{
  "@type": "PropertyValue",
  "name": "Photochromic",
  "propertyID": "photochromic",
  "value": "{{ ew.photochromic.value }}",
  "description": "Photochromic lenses darken in UV/visible light and return to clear indoors."
},
{% endif %}

{% if ew.blue_light_filter != blank %}
{
  "@type": "PropertyValue",
  "name": "Blue Light Filter",
  "propertyID": "blueLightFilter",
  "value": "{{ ew.blue_light_filter.value }}"
},
{% endif %}

{% if ew.safety_standard != blank %}
{# ANSI Z87.1 certification block — emitted for safety eyewear only #}
"hasCertification": [
  {
    "@type": "Certification",
    "name": "{{ ew.safety_standard.value }}",
    "certificationIdentification": "{{ ew.safety_standard.value }}",
    "issuedBy": {
      "@type": "Organization",
      "name": "ANSI/ISEA"
    }
  }
]
{% endif %}

This conditional structure ensures that sunglasses without a safety_standard metafield do not emit an empty or misleading hasCertification block, and safety glasses without a photochromic metafield do not emit an empty photochromic property. The pattern scales to any number of eyewear sub-categories without template forking.

7. Five Common Eyewear Schema Mistakes

• Using "UV protection" without specifying UV400 or a percentage

  AI agents distinguish UV400 (blocks 100% of UV up to 400nm, a specific measurable claim) from "UV protection" (a marketing phrase with no numeric value). A product marked only "UV protection" cannot match the query "UV400 sunglasses" — the AI agent cannot infer UV400 from an unqualified claim. Always use the value "UV400" or include the percentage ("blocks 100% UV") in the additionalProperty value or description. The three common label variants — UV400, UV100%, CE UV 400 — all mean the same thing and should be noted in the description so the agent can normalize them.

• Conflating polarized and UV protection in a single field

  Many merchants and customers conflate polarized and UV protection, but they are physically independent properties. Polarized lenses use a vertical filter to block horizontally polarized glare — this has no effect on UV radiation. UV protection is a separate coating or material property. A non-UV polarized lens is possible; a UV400 non-polarized lens is common (most standard sunglasses). Emit two separate additionalProperty entries — one for UV Protection and one for Polarized — even if the product has both. AI agents filtering "polarized UV400 sunglasses" check both properties independently.

• Omitting frame dimensions in favor of S/M/L size labels

  "Small," "medium," and "large" are not machine-readable for dimension queries. AI agents handling "sunglasses 58mm eye size" or "narrow bridge glasses 12mm" cannot match these queries to a product with size label "Large" in a string field. Eye size in mm, bridge in mm, and temple in mm are the only machine-readable expressions of frame fit. The size label can coexist as a separate additionalProperty (Frame Size Category: "Large — 55-18-145"), but the numeric dimensions must be present. See also: our apparel size schema guide for the general principle of exposing numeric measurements alongside size labels.

• Missing prescription compatibility boolean

  High-intent eyewear queries frequently include prescription compatibility: "prescription-compatible polarized sunglasses," "Rx-ready titanium frames," "sunglasses that accept prescription lenses." Without a Prescription Compatible additionalProperty, these queries cannot match the product. The value should be descriptive — not just "Yes" — and include the diopter range where applicable: "Yes — prescription lenses available in -6.00 to +6.00 diopter range." Customers with strong prescriptions (above ±4.00) are specifically filtering on diopter range because not all frames can accommodate thick lenses.

• ANSI Z87.1 without distinguishing basic vs high impact

  ANSI Z87.1 (basic impact) and ANSI Z87.1+ (high impact) are legally different certifications with different test standards. OSHA 1910.133 and industry safety programs often specify minimum impact level — a purchasing manager specifying "Z87+ high impact" will not accept basic Z87.1 product. Express the distinction in the Impact Rating additionalProperty value ("Z87.1+ High Impact" vs "Z87.1 Basic Impact") rather than only in the hasCertification block. The hasCertification name should also reflect the correct tier: "ANSI/ISEA Z87.1-2020 — High Impact" vs "ANSI/ISEA Z87.1-2020 — Basic Impact." See also: our children's product safety certification guide for the general pattern of tiered certification handling.