Ophthalmic optics. Visual acuity testing. Standard and clinical optotypes and their presentation Ingestion-build-105964 PDCMS estimate if the driver

PDCMS estimate if the driver has an adequate opportunity to respond to the hazard

Evaluation of the business case has been expanded along with a new clause on defined engagement strategy

EN 438‑4 [2]

These guidelines and rules are part of the FDT specification (IEC TR 62453‑42) and are intended to ensure that all users are provided with clear and consistent user interface functions and features across DTMs in a system

Ophthalmic optics. Visual acuity testing. Standard and clinical optotypes and their presentation Ingestion-build-105964 PDCMS estimate if the driver1 Scope 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.