ISO 8596:2017

Name: ISO 8596:2017 — Ophthalmic optics — Visual acuity testing — Standard and clinical optotypes and their presentation
SKU: ISO 8596:2017
Price: 18000 RUB
Availability: InStock

Ophthalmic optics — Visual acuity testing — Standard and clinical optotypes and their presentation

Название (английский):

ISO 8596:2017

Ophthalmic optics — Visual acuity testing — Standard and clinical optotypes and their presentation

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 28 ноября 2017 г.
Издание:: ISO IS 8596 edition 3 version 1
ICS:: 11.040.70

Тип поставки:

Full version18 000 ₽Read online 24h1 200 ₽Read online 72h1 800 ₽

Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:18 000 ₽

Описание (английский):

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.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 8596:2017, "Ophthalmic optics - Visual acuity testing - Standard and clinical optotypes and their presentation," defines the standard optotype (Landolt ring) and a method for measuring distance visual acuity under photopic conditions for purposes such as certification or licensing. It is not intended as a clinical measurement standard for diagnosing blindness or partial sight. Annex A provides information on other clinical optotypes for investigative use.

Key topics and technical requirements

Standard optotype: Specifies the Landolt ring geometry (outer diameter, limb width and gap) and eight gap orientations (horizontal, vertical, four diagonals).

Visual acuity scales: Supports decimal visual acuity, Snellen fraction, and LogMAR; defines corresponding visual acuity grades (see Table 1 of the standard).

Optotype sizing and progression: Gap sizes follow a logarithmic progression with a size ratio of 10^(1/10) ≈ 1.2589 (ISO series R10).

Presentation and spacing: Minimum spacing rules between optotypes depend on acuity grade; test field must extend ≥0.5° around optotypes and background must be uniform to avoid orientation cues.

Luminance requirements: Surround (chart background) luminance between 80–320 cd/m² (recommended 200 cd/m²); optotype luminance not more than 15% of surround when measured in a darkened room; limits on luminance variability and glare.

Viewing distance: Minimum 4.0 m between subject entrance pupil and optotype for distance testing.

Test procedures and pass criteria: Preferred presentations are 5 or 10 optotypes per size; “Pass” requires at least 3/5 or 6/10 correct. Rules for termination and assignment of the visual acuity grade are specified.

Quality and reporting: Optotypes must have sharply defined contours and consistent contrast. Test reports must reference ISO 8596:2017 and include instrument, acuity grades used, viewing distance, assigned grade, examiner, date and location.

Applications and users

ISO 8596:2017 is used by:

Certification and licensing authorities (driver licensing, occupational fitness)

Manufacturers of vision testing charts and automated visual acuity instruments

Metrology and conformity assessment bodies validating instrument presentation quality

Researchers comparing optotypes (use Annex A and ISO/TR 19498 for correlation to the Landolt ring)

The standard ensures reproducible, comparable distance visual acuity measurements for regulatory and certification purposes and provides technical requirements for chart design, presentation, luminance control, and reporting.

Related standards

ISO/TR 19498 - guidance on correlating clinical optotypes to the standard optotype

ISO 3:1973 - preferred numbers (series R10) used for optotype size progression

ISO/IEC Directives - editorial and development procedures referenced by ISO documents

Keywords: ISO 8596:2017, visual acuity testing, Landolt ring, ophthalmic optics, standard optotype, distance visual acuity, Snellen, LogMAR, luminance, clinical optotypes.

ISO 8596:2017

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 3:1973

Preferred numbers — Series of preferred numbers

PD ISO/TR 19498:2015

Ophthalmic optics and instruments. Correlation of optotypes

ISO/TS 10303-403:2010

Industrial automation systems and integration — Product data representation and exchange — Part 403: Applicat…

ISO/TS 10303-3001:2018

Industrial automation systems and integration — Product data representation and exchange — Part 3001: Busines…

ISO/TS 10303-1821:2014

Industrial automation systems and integration — Product data representation and exchange — Part 1821: Apllica…

ISO/TS 10303-1817:2014

Industrial automation systems and integration — Product data representation and exchange — Part 1817: Applica…

ISO/TS 10303-1810:2014

Industrial automation systems and integration — Product data representation and exchange — Part 1810: Applica…

ISO/TS 10303-1805:2014

Industrial automation systems and integration — Product data representation and exchange — Part 1805: Applica…