Ophthalmic optics - Visual acuity testing - Standard and clinical optotypes and their presentation
|Publication Date:||1 November 2017|
|ICS Code (Ophthalmic equipment):||11.040.70|
This document 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.
This document 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.