BS EN ISO 8429:1997

What is ISO 8429 - Graduated dial scale about?

ISO 8429 is a European standard that discusses ophthalmology for optics and optical instruments. ISO 8429 specifications for the angular coordinate system to be used in the design of scales, reticles, or other display means incorporated in instruments for determining optical data on human eyes or corrective lenses for human eyes. Note: An example of a scale designed using the coordinate system is shown. It is shown with a specific angular scale design, this is by no means meant to imply that other designs cannot be used and still be considered within the scope and intent of .