Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (First Revision) which is identical with ISO 10938 : 2016 ‘Ophthalmic optics — Chart displays for visual acuity measurement — Printed, projected and electronic’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of Ophthalmic Instruments and Appliances Sectional Committee, and approval of the Medical Equipment and Hospital Planning Division Council.

This standard was originally published in 2014 which was identical with ISO 10938 : 1998 ‘Ophthalmic instruments — Chart projectors’. The first revision of this standard has been undertaken to align it with the latest version of ISO 10938 : 2016.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’; and

b) Comma (,) has been used as the decimal marker, while in Indian Standards, the current practice is to use a point (.) as a decimal marker.