SN EN ISO 19980 : 2012
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
OPHTHALMIC INSTRUMENTS - CORNEAL TOPOGRAPHERS (ISO 19980:2012)
08-01-2021
01-12-2013
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Area measured
4.2 Measurement sample density
4.3 Measurement and report of performance
4.4 Colour presentation of results
5 Test methods and test devices
5.1 Tests
5.2 Test surfaces
5.3 Data collection, test surfaces
5.4 Analysis of the data
6 Accompanying documents
7 Marking
Annex A (informative) Test surfaces for corneal
topographers
Annex B (normative) Standardized displays for corneal
topographers
Annex C (normative) Calculation of area-weighting values
Annex D (normative) Test methods for measuring human corneas
Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.