ISO 8596:1994

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Ophthalmic optics -- Visual acuity testing -- Standard optotype and its presentation

Specifies a range of Landolt ring optotypes and describes a method for measuring distance visual acuity under daylight conditions for the purposes of certification or licensing.

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Ophthalmic optics -- Visual acuity testing -- Standard optotype and its presentation

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Historical

ISO 8596:1994

Ophthalmic optics -- Visual acuity testing -- Standard optotype and its presentation

Are the documents at the ANSI Webstore in electronic Adobe Acrobat PDF format only?

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