C.8.25.16.3 Keratometry Macro

Table C.8.25.16-3 describes the attributes for the Keratometry Macro.

Table C.8.25.16-3 KERATOMETRY MACRO

Attribute Name Tag Type Attribute Description
Steep Keratometric Axis Sequence (0046,0074) 1 Steepest meridian as defined by the greatest power of curvature and shortest radius of curvature. Only a single Item shall be included in this sequence.
>Radius of Curvature (0046,0075) 1 The radius of curvature of the principal meridians of the cornea, measured in mm.
>Keratometric Power (0046,0076) 2 The refractive power of the cornea at the principal meridians, measured in diopters.
>Keratometric Axis (0046,0077) 2 The meridian where the keratometric radius of curvature or power is measured, in degrees.
Flat Keratometric Axis Sequence (0046,0080) 1 Flattest meridian as defined by the least power of curvature and longest radius of curvature. Only a single Item shall be included in this sequence.
>Radius of Curvature (0046,0075) 1 The radius of curvature of the principal meridians of the cornea, measured in mm.
>Keratometric Power (0046,0076) 2 The refractive power of the cornea at the principal meridians, measured in diopters.
>Keratometric Axis (0046,0077) 2 The meridian where the keratometric radius of curvature or power is measured, in degrees.
Keratometry Measurement Type Code Sequence (0022,1096) 2 Descriptors relevant to keratometry data. Zero or one Item shall be included in this sequence.
>Include 'Code Sequence Macro' Table 8.8-1. Defined Context ID is 4235
Keratometer Index (0022,1033) 2 The translation factor specific to each keratometer that derives a number for power from the measured radius of curvature of the cornea.