{"hq_id":"hq-p-wer-000028","name":"Prescription eyeglasses and optical frames","category":{"primary":"specialty","secondary":"optical_eyewear","tags":["glasses","eyeglasses","optical","polycarbonate","CR-39","BPA"]},"product_tier":"WER","overall_risk_level":"low","description":"Vision correction eyeglasses with polycarbonate or CR-39 (allyl diglycol carbonate) lenses and frames manufactured from acetate or titanium alloys. Products include coatings (anti-reflective, scratch-resistant, blue light filter) and materials with potential hazards from unreacted monomers in lenses, metal allergies from titanium, and chemical additives in coatings.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.601,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.15,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":4,"compounds_total":4,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"iarc_classification":"BPA is not classified as carcinogenic but is endocrine disruptor; acrylates not IARC classified","key_concern":"Unreacted monomers (BPA, acrylates) and plasticizers in frames; metal allergy potential from nickel in titanium alloys","litigation":null,"overall_risk":"low","primary_concerns":["Bisphenol A (BPA) leaching from polycarbonate lenses causes endocrine disruption","Plasticizers (phthalates) in cellulose acetate frames are reproductive toxicants","Acrylate monomers in CR-39 lenses can sensitize skin","Nickel in titanium alloy frames causes allergic contact dermatitis"],"sensitive_populations":"pregnant individuals, individuals with nickel allergy, individuals with contact dermatitis","exposure_routes":"ocular, dermal"},"exposure":{"routes":["dermal"],"contact_types":["ocular","dermal"],"users":["adult","child"],"duration":"hours","frequency":"daily","scenarios":["Incidental mouthing or hand-to-mouth transfer by children"],"notes":"Direct eye contact with lens surfaces and coatings; skin contact with frame material at nose, ears, and temples; daily wear with prolonged contact increases chemical exposure"},"consumer_guidance":{"red_flags":[{"indicator":"Eye irritation or redness after putting on new glasses","meaning":"Reaction to unreacted monomers in lenses or coating components","action":"Clean lenses thoroughly; air out glasses; discontinue use if symptoms persist and seek eye care"},{"indicator":"Skin rash or irritation at nose bridge or ear contact points","meaning":"Allergic reaction to frame material (nickel, phthalates, or adhesives) or coating components","action":"Request nickel-free frames; wash frame contact points with soap and water; discontinue wear if severe"}],"green_flags":[{"indicator":"BPA-free polycarbonate or CR-39 lenses","meaning":"Eliminates bisphenol A (endocrine disruptor) from lens material","verification":"Request product information or certification from optometrist"},{"indicator":"Phthalate-free or certified safe frame material","meaning":"Eliminates reproductive toxicant exposure from frame plasticizers","verification":"Confirm material certification with optometrist or manufacturer"},{"indicator":"Pure titanium (nickel-free) frames","meaning":"Eliminates nickel allergy risk for sensitive individuals","verification":"Check product specification for frame material composition"}],"what_to_ask":[{"question":"Are the lenses made from BPA-free polycarbonate or CR-39?","why_it_matters":"BPA is an endocrine disruptor; daily contact through eyes and skin increases exposure"},{"question":"What material are the frames made from and are plasticizers used?","why_it_matters":"Clarifies if phthalates or other reproductive toxicants are present"},{"question":"Are the frames made from pure titanium or nickel-free alloy?","why_it_matters":"Important for individuals with nickel allergy"}],"alternatives":[{"name":"BPA-free polycarbonate or CR-39 lenses","notes":"Reduces endocrine disruptor exposure; request from optometrist"},{"name":"Phthalate-free acetate or pure titanium frames","notes":"Eliminates reproductive toxicant and metal allergy risks"},{"name":"Glasses with minimal or natural coatings","notes":"Reduces exposure to chemical additives in optical coatings"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"FDA regulation of ophthalmic lenses (CFR 801.410)","citation":null,"requirements":"Lens material requirements, impact resistance, optical properties; FDA registration of manufacturers","compliance_status":null,"effective_date":null,"enforcing_agency":"FDA","penalties":null,"source_ref":null},{"jurisdiction":"USA","regulation":"ANSI Z80.1 (Reference Standards for Ophthalmic Lenses and Devices)","citation":null,"requirements":"Optical properties, material durability, and chemical resistance standards","compliance_status":null,"effective_date":null,"enforcing_agency":"ANSI","penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"EN ISO 12312-1 (Eye and face protection - Sunglasses and related eyewear)","citation":null,"requirements":"UV protection, optical quality, and material safety standards","compliance_status":null,"effective_date":null,"enforcing_agency":"CEN","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":["Lens material type (polycarbonate, CR-39, glass)","Lens power and optical properties","Frame material composition","Country of origin"],"prop65_warning":{"required":false,"chemicals":[],"endpoint":null,"notes":"BPA not required to carry Prop 65 warning despite endocrine disruptor classification"},"ghs_labeling":{"required":false,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":true,"categories_hidden":["Unreacted monomer concentrations not disclosed","Specific plasticizers in acetate frames not listed","Coating chemistry (anti-reflective, scratch-resistant) often proprietary"],"estimated_count":3,"known_concerns":"Manufacturers do not routinely disclose BPA content in lenses, phthalate content in acetate frames, or coating formulations","notes":null},"notes":null},"recalls":[],"regulatory_gap":"No mandatory testing or labeling of BPA or other monomer residues; phthalate restrictions minimal for eyewear; nickel content in titanium alloys not standardized","notes":null},"lifecycle":{"recyclable":true,"disposal_guidance":"Donate or sell if functional. Many optometrists accept used glasses for donation or recycling programs.","hazardous_waste":false,"expected_lifespan":"2-4_years"},"formulation":{"form":"solid","key_ingredients":[{"hq_id":"hq-c-ino-000083","name":"Polycarbonate or CR-39 resin","role":"optical_substrate","concentration_pct":"primary"},{"hq_id":"hq-c-ino-000047","name":"Acetate (cellulose acetate) or titanium metal","role":"frame_material","concentration_pct":"secondary"},{"hq_id":"hq-c-org-000043","name":"Anti-reflective coating (silicon monoxide or multi-layer dielectric)","role":"optical_enhancement","concentration_pct":"trace"},{"hq_id":"hq-c-ino-000044","name":"Scratch-resistant hardening agent","role":"durability","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[{"material_id":"hq-m-str-000007","material_name":"Polycarbonate lens","component":"optical surface","prevalence":"very_common","notes":"Impact-resistant synthetic plastic; provides clear optics; scratch-prone without hardcoat","hq_id":"hq-m-str-000007"},{"material_id":null,"material_name":"CR-39 (allyl diglycol carbonate) lens","component":"optical surface","prevalence":"common","notes":"Natural-origin thermosetting plastic; good optical properties; slightly heavier than polycarbonate"},{"material_id":null,"material_name":"Cellulose acetate frame","component":"structural support","prevalence":"very_common","notes":"Comfortable, lightweight, hypoallergenic plastic; traditional frame material"},{"material_id":null,"material_name":"Titanium or titanium alloy frame","component":"structural support","prevalence":"common","notes":"Hypoallergenic metal; lightweight; durable; premium material"}],"concerning":[{"material_id":"hq-m-str-000007","material_name":"Unreacted monomers in CR-39 or polycarbonate lenses","concern":"Residual monomers (bisphenol A in polycarbonate, acrylate monomers in CR-39) can leach into tears or through skin contact; BPA is endocrine disruptor; acrylates are skin sensitizers","compounds_of_concern":[],"source_refs":[],"hq_id":"hq-m-str-000007"},{"material_id":null,"material_name":"Plasticizers in cellulose acetate frames","concern":"Phthalates or other plasticizers may leach, especially with skin sweat contact; reproductive toxicants","compounds_of_concern":[],"source_refs":[]},{"material_id":null,"material_name":"Anti-reflective coating chemicals","concern":"Multi-layer coatings contain silica, rare earth elements, or other compounds; some abraded coating particles may be inhaled or ingested","compounds_of_concern":[],"source_refs":[]},{"material_id":null,"material_name":"Nickel in titanium alloys","concern":"Some titanium alloys contain small amounts of nickel; can cause allergic contact dermatitis in sensitized individuals","compounds_of_concern":[],"source_refs":[]}],"preferred":[{"material_id":"hq-m-str-000007","material_name":"BPA-free polycarbonate or CR-39 lenses with certified low monomer residuals","why_preferred":"Minimizes endocrine disruptor and skin sensitizer exposure","tradeoffs":"Limited availability; potentially higher cost","hq_id":"hq-m-str-000007"},{"material_id":null,"material_name":"Phthalate-free cellulose acetate or titanium frames","why_preferred":"Eliminates reproductive toxicant leaching from frames","tradeoffs":"Specialized manufacturing; higher cost"},{"material_id":null,"material_name":"Nickel-free titanium (pure titanium or nickel-free alloy)","why_preferred":"Eliminates allergic sensitization risk for sensitive individuals","tradeoffs":"Limited commercial availability; higher cost"}]},"compound_composition":[{"hq_id":"hq-c-ino-000083","compound_name":"Indium and Indium Tin Oxide (ITO)","role":"optical_substrate","typical_concentration":null},{"hq_id":"hq-c-ino-000047","compound_name":"Amorphous silica nanoparticles (nano-SiO2, E551)","role":"frame_material","typical_concentration":null},{"hq_id":"hq-c-org-000043","compound_name":"Carbon monoxide","role":"optical_enhancement","typical_concentration":null},{"hq_id":"hq-c-ino-000044","compound_name":"Nickel (elemental)","role":"durability","typical_concentration":null}],"identifiers":{"common_names":["prescription eyeglasses","optical frames","eyeglasses","spectacles","reading glasses","progressive lenses"],"manufacturer":null,"aliases":[],"brands":[]},"brand_examples":[{"brand":"Generic Mass-Market Brand A","manufacturer":"Consumer Products Corporation","market_position":"mass_market","notable":"Widely available mass-market option"},{"brand":"Generic Mass-Market Brand B","manufacturer":"Consumer Goods Ltd","market_position":"mass_market","notable":"Popular budget alternative"},{"brand":"Premium Brand A","manufacturer":"Premium Consumer Inc","market_position":"premium","notable":"Upscale premium positioning"},{"brand":"Professional Brand","manufacturer":"Professional Products Co","market_position":"professional","notable":"Professional/salon-grade option"},{"brand":"Specialty Eco-Brand","manufacturer":"Natural Products Ltd","market_position":"premium","notable":"Sustainable/natural product line"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"title":"OEKO-TEX Standard 100 - Textile Safety","type":"industry","url":"https://www.oeko-tex.com/","accessed":"2026-03-23"},{"title":"EU REACH - Chemical Safety","type":"regulatory","url":"https://echa.europa.eu/reach","accessed":"2026-03-23"},{"title":"CPSIA - Consumer Product Safety Improvement Act","type":"regulatory","url":"https://www.cpsc.gov/articles/consumer-product-safety-improvement-act-cpsia","accessed":"2026-03-23"},{"title":"ZDHC Gateway - Chemical Compliance","type":"database","url":"https://www.zdhcgateway.com/","accessed":"2026-03-23"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:22:52.666Z"}}