ISO/TR 11797:2024
International Standard
Current Edition
·
Approved on
06 November 2024
Ophthalmic optics – Spectacle lenses – Power and prism measurements
ISO/TR 11797:2024 Files
English
50 Pages
Current Edition
83.95 BHD
ISO/TR 11797:2024 Scope
This document describes the methods currently used in applying tolerances to the focal powers of spectacle lenses and methods that can be considered for adoption in the future; it also describes methods of measuring the prism imbalance (relative prism error) between the lenses of a mounted pair. The results of a 2014 survey of manufacturing capability for lens power and a 2018 international web survey are discussed, as are possible new methods for applying tolerances to the focal power of spectacle lenses.
Best Sellers
GSO 150-2:2013
Gulf Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates

BH GSO 150-2:2015
GSO 150-2:2013
Bahraini Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates


BH GSO 2055-1:2016
GSO 2055-1:2015
Bahraini Technical Regulation
HALAL FOOD - Part 1 : General Requirements


GSO 2055-1:2015
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements

Recently Published
ISO 1952:2025
International Standard
Coal — Determination of extractable metals in dilute hydrochloric acid

ISO 5834-1:2025
International Standard
Implants for surgery — Ultra-high-molecular-weight polyethylene — Part 1: Powder form

ISO 5834-3:2025
International Standard
Implants for surgery — Ultra-high-molecular-weight polyethylene — Part 3: Accelerated ageing methods after gamma irradiation in air

ISO 15238:2025
International Standard
Coal — Determination of total cadmium
