NIH Common Data Elements (CDE) Repository

General Details:

Name:: Cylinder axis L eye
Steward:: LOINC
Definition:: The axis indicates the angle in degrees of one of two major meridians the prescribed cylindrical power is in. Which major meridian is referenced is indicated by the cylindrical correction being in plus or minus notation. The axis is measured on an imaginary semicircle with a horizontal baseline that starts with zero degrees in the 3 o'clock (or east) direction, and increases to 180 degrees in a counter-clockwise direction.
Registration Status:: Qualified

Value	Code Name	Code	Code System	Code Description

Definition:: The axis indicates the angle in degrees of one of two major meridians the prescribed cylindrical power is in. Which major meridian is referenced is indicated by the cylindrical correction being in plus or minus notation. The axis is measured on an imaginary semicircle with a horizontal baseline that starts with zero degrees in the 3 o'clock (or east) direction, and increases to 180 degrees in a counter-clockwise direction.
Tags:: Source: Regenstrief LOINC

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Related Names

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Related Codes

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Code System	Code	Code Text	Code Version
https://www.phenxtoolkit.org	PX111401080000	PX111401_Left_Eye_Cylindrical_Power		https://www.phenxtoolkit.org	PX111402090000	PX111402_Left_Eye_Autorefraction_Cylinder_Axis		https://www.phenxtoolkit.org	PX111402160000	PX111402_Left_Eye_Retinoscopy_Cylinder_Axis

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Fully-Specified Name

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Component	Property	Time	System	Scale	Method
Cylinder axis	Angle	Pt	Eye.left	Qn

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Basic Attributes

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Class	Type	First Released	Last Updated	Change Reason
PHENX	Clinical	Version 2.36	Version 2.68	Updated the PhenX ID from "PhenX." to "PX" in Survey Question Source field to align with the variable identifier used in the PhenX Toolkit.