DICOM PS3.3 2020c - Information Object Definitions

C.8.25.16.3 Keratometry Macro (Current)
Prev | C.8.25.16 Intraocular Lens Calculations Module | Next

##### 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 Attributes

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 Table 8.8-1 “Code Sequence Macro Attributes” | DCID 4235 “Keratometry Descriptors”
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.

Prev | Up | Next
C.8.25.16.2 Intraocular Lens Calculations Macro | Home | C.8.25.16.4 IOL Ophthalmic Axial Length Macro

DICOM PS3.3 2020c - Information Object Definitions