Optics and optical instruments - Focimeters - Part 1: General purpose instruments used for measuring spectacle lenses
STANDARD published on 1.2.2015
Designation standards: ČSN EN ISO 8598-1
Classification mark: 195015
Catalog number: 96483
Publication date standards: 1.2.2015
The number of pages: 40
Approximate weight : 120 g (0.26 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
This part of ISO 8598 specifies requirements and test methods for general purpose focimeters designed for the measurement of vertex powers, cylinder axis, prismatic power and prism base setting within a restricted area at a specified location of a lens. This excludes instruments that can only measure the whole lens at once. It is applicable to instruments typically intended for use by the ophthalmic community, with the capability to demonstrate conformity of lens products with the International Standards existing for these lenses