Materials glossary / Lens material
Progressive lens
On the label: Progressive lens · Lens material
What it is
A lens with a gradual change from distance to reading power, no visible line; a prescription item in most cases.
Lens materials: What a lens is made of decides its weight, clarity, impact resistance and how it takes a coating; UV blocking is a property of the material and its additives, not the tint.
Wikidata: Type of corrective lens used in eyeglasses. Q1530657 →
In the research
73 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Dysfunctional lens syndrome: Molecular, biomechanical, optical and clinical aspects of crystalline lens aging · Archivos de la Sociedad Espanola de Oftalmologia, 2026
- Mechanical basis of cortical cataract · Graefe's archive for clinical and experimental ophthalmology = Albrecht von Grae, 2026
- Traumatic Cataract · , 2026
A paper is a paper, not a verdict: titles are listed so you can read them, and a study on one fabric or one filter says little about the piece in your hand.
Other lens materials
Clasp & Lens describes materials from the public record and does not appraise, grade or test pieces; what a listing states is the supplier's statement. If a piece causes a rash, take it off; a reaction that spreads or blisters is a doctor's question, and sunglasses are no substitute for impact-rated eye protection where that is required.