International Standard
ISO 8596:2017
Ophthalmic optics — Visual acuity testing — Standard and clinical optotypes and their presentation
Reference number
ISO 8596:2017
Edition 3
International Standard
Read sample
ISO 8596:2017
Published (Edition 3, 2017)
This standard was last reviewed and confirmed in 2023. Therefore this version remains current.
This standard has 1 amendment.

ISO 8596:2017

ISO 8596:2017
CHF 63
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ISO 8596:2017 specifies a range of Landolt ring optotypes and describes a method for measuring distance visual acuity under photopic conditions for the purposes of certification or licensing.

ISO 8596:2017 is neither intended as a standard for clinical measurements nor for the certification of blindness or partial sight.

Other optotypes used for clinical investigations are described in Annex A for information.

General information

  •  : Published
     : 2017-11
    : International Standard confirmed [90.93]
  •  : 3
     : 10
  • ISO/TC 172/SC 7
  • RSS updates


Amendments are issued when it is found that new material may need to be added to an existing standardization document. They may also include editorial or technical corrections to be applied to the existing document.

Amendment 1

Edition 2019

ISO 8596:2017/Amd 1:2019
CHF 18
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