Do you wear glasses? Then you know the importance of having frames that are comfortable, will not break or deform or cause unwanted allergic reactions (e.g. through nickel release). To ensure that glasses manufactured everywhere in the world are safe to use, ISO has developed a standard outlining fundamental requirements for spectacles frames.
Ronald Rabbetts, Convenor of the working group that developed the standard explains, “Spectacle frames, like a lot of other products today, may cross a number of borders during the manufacturing processes all the way to the point of sale. Producers need common specifications to be competitive in global markets. Opticians need to be assured that they have all the information and requirements about the product they offer. And consumers want to know that the frames are safe, comfortable and durable. The new ISO 12870 guarantees just that.”
ISO 12870:2012, Ophthalmic optics – Spectacle frames – Requirements and test methods, applies to spectacle frames for all prescription lenses. It outlines requirements for:
- Physiological compatibility
- Dimensional tolerances
- Tolerance on screw threads
- Dimensional stability at elevated temperature
- Resistance to perspiration
- Mechanical stability
- Resistance to ignition
- Resistance to optical radiation.
The standard includes guidelines for testing, inspection, compliance, marking and information labeling. In addition, it provides recommendations for the design of spectacle frames.
ISO 12870 is applicable to frames at the point of sale by the manufacturer or supplier to the optician or retailer. This third edition cancels and replaces the 2004 version which has been technically revised.
ISO 12870:2012, Ophthalmic optics – Spectacle frames – Requirements and test methods, was developed by ISO technical committee ISO/TC 172, Optics and photonics, subcommittee SC 7, Ophthalmic optics and instruments. It is available from ISO national member institutes (see the complete list with contact details). It may also be obtained directly from the ISO Central Secretariat, price 122 Swiss francs respectively through the ISO Store or by contacting the Marketing, Communication & Information department.