Teräslasit

Teräslasit, often translated as "steel glasses" or "steel spectacles," is a term that can refer to several things, most commonly historical examples of eyeglasses made with steel components or a specific type of eyewear designed for protective or industrial use. In early eyeglasses, metal frames were common, and steel offered a durable and relatively affordable option for constructing the temples, bridge, and rims that held the lenses. These early steel-rimmed spectacles often had a functional rather than decorative appearance.

More recently, "teräslasit" can also denote safety glasses or goggles made with robust steel frames or reinforced construction. These are designed to protect the eyes from impact, debris, or other workplace hazards in environments such as construction sites, manufacturing facilities, or laboratories. The term emphasizes the material's strength and durability, suggesting eyewear that can withstand significant stress. Without further context, the specific meaning of "teräslasit" relies on the historical period or the intended application being discussed. It's a term that bridges the evolution of eyewear technology from early optical aids to modern protective equipment.