C.8.25.10 Keratometry Measurements Module

Table C.8.25.10-1 defines the Attributes used to represent the keratometric measurements by a keratometer of a patient’s eyes. Usually both eyes are measured, but sometimes just one.

Table C.8.25.10-1KERATOMETRY MEASUREMENTS MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Keratometry Right Eye Sequence (0046,0070) 1C A sequence that specifies keratometric measurements of a patient’s right eye, defining principal meridians wherein the steepest meridian is separated by 90 degrees from the flattest. Only a single item shall be included in this sequence. Required if the right eye is measured. Note: Consideration for steep, flat, and spherical meridians is made. For instances where spherical keratometric measurements are obtained, values specified in the steep and flat Attributes are equivalent.
>Include ‘Keratometric Measurements Macro' Table C.8.25.10-2
Keratometry Left Eye Sequence (0046,0071) 1C A sequence that specifies keratometric measurements of a patient’s left eye, defining principal meridians wherein the steepest meridian is separated by 90 degrees from the flattest. Only a single item shall be included in this sequence. Required if the left eye is measured. Note: See Note for attribute Keratometry Right Eye Sequence (0046,0070)
>Include ‘Keratometric Measurements Macro' Table C.8.25.10-2

Table C.8.25.10-2 describes the attributes for the Keratometric Measurements Macro.

Table C.8.25.10-2 KERATOMETRIC MEASUREMENTS MACRO

Attribute Name Tag Type Attribute Description
Steep Keratometric Axis Sequence (0046,0074) 1 A sequence that specifies the 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) 1 The refractive power of the cornea at the principal meridians, measured in diopters.
>Keratometric Axis (0046,0077) 1 The meridian where the keratometric radius of curvature or power is measured, in degrees.
Flat Keratometric Axis Sequence (0046,0080) 1 A sequence that specifies the 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) 1 The refractive power of the cornea at the principal meridians, measured in diopters.
>Keratometric Axis (0046,0077) 1 The meridian where the keratometric radius of curvature or power is measured, in degrees.