A.60 Ophthalmic Refractive Measurements Information Object Definitions
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## A.60 Ophthalmic Refractive Measurements Information Object Definitions

The following IODs specify module use for storage of the measurements from ophthalmic refractive instruments. These instruments address the power of a lens or of a patient's eye to bend light. There are many ophthalmic refractive instruments used to create this type of information. Some examples include Lensometers, Keratometers, Autorefractors, etc. An Ophthalmic Measurements SOP Instance is related to a single Series within a single Study.

### A.60.1 Lensometry Measurements IOD

#### A.60.1.1 Lensometry Measurements Information Object Description

The Lensometry Measurements IOD is used to capture the refractive measurements by a lensometer of spectacles.

#### A.60.1.2 Lensometry Measurements IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Lensometry Measurements IOD.

#### A.60.1.3 Lensometry Measurements IOD Module Table

Table A.60.1-1 specifies the Modules of the Lensometry Measurements IOD.

Table A.60.1-1. Lensometry Measurements IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Lensometry Measurements Series | C.8.25.1 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | General Ophthalmic Refractive Measurements | C.8.25.7 | M
Lensometry Measurements | C.8.25.8 | M
SOP Common | C.12.1 | M

### A.60.2 Autorefraction Measurements IOD

#### A.60.2.1 Autorefraction Measurements Information Object Description

The Autorefraction Measurements IOD is used to encode the results of a modality (autorefractor) that automatically determines, without patient input, what a patient's refractive correction should be.

#### A.60.2.2 Autorefraction Measurements IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Autorefraction Measurements IOD.

#### A.60.2.3 Autorefraction Measurements IOD Module Table

Table A.60.2-1 specifies the Modules of the Autorefraction Measurements IOD.

Table A.60.2-1. Autorefraction Measurements IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Autorefraction Measurements Series | C.8.25.2 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | General Ophthalmic Refractive Measurements | C.8.25.7 | M
Autorefraction Measurements | C.8.25.9 | M
SOP Common | C.12.1 | M

### A.60.3 Keratometry Measurements IOD

#### A.60.3.1 Keratometry Measurements Information Object Description

The Keratometry Measurements IOD is used to encode the measurements of a modality (keratometer) that measures the curvature, and thus the refractive power, of a patient's cornea.

#### A.60.3.2 Keratometry Measurements IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Keratometry Measurements IOD.

#### A.60.3.3 Keratometry Measurements IOD Module Table

Table A.60.3-1 specifies the Modules of the Keratometry Measurements IOD.

Table A.60.3-1. Keratometry Measurements IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Keratometry Measurements Series | C.8.25.3 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | General Ophthalmic Refractive Measurements | C.8.25.7 | M
Keratometry Measurements | C.8.25.10 | M
SOP Common | C.12.1 | M

### A.60.4 Subjective Refraction Measurements IOD

#### A.60.4.1 Subjective Refraction Measurements Information Object Description

The Subjective Refraction Measurements IOD is used for encoding the measurements that subjectively determine the refractive correction of the eye that results in best corrected visual acuity.

#### A.60.4.2 Subjective Refraction Measurements IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Subjective Refraction Measurements IOD.

#### A.60.4.3 Subjective Refraction Measurements IOD Module Table

Table A.60.4-1 specifies the Modules of the Subjective Refraction Measurements IOD.

Table A.60.4-1. Subjective Refraction Measurements IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Subjective Refraction Measurements Series | C.8.25.4 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | General Ophthalmic Refractive Measurements | C.8.25.7 | M
Subjective Refraction Measurements | C.8.25.11 | M
SOP Common | C.12.1 | M

### A.60.5 Visual Acuity Measurements IOD

#### A.60.5.1 Visual Acuity Measurements Information Object Description

The Visual Acuity Measurements IOD is used to capture a patient's visual acuity relative to that of a reference standard patient under given viewing conditions (distance, lighting, etc.).

#### A.60.5.2 Visual Acuity Measurements IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Visual Acuity Measurements IOD.

#### A.60.5.3 Visual Acuity Measurements IOD Module Table

Table A.60.5-1 specifies the Modules of the Visual Acuity Measurements IOD.

Table A.60.5-1. Visual Acuity Measurements IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Visual Acuity Measurements Series | C.8.25.5 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | General Ophthalmic Refractive Measurements | C.8.25.7 | M
Visual Acuity Measurements | C.8.25.12 | M
SOP Common | C.12.1 | M

### A.60.6 Ophthalmic Axial Measurements IOD

#### A.60.6.1 Ophthalmic Axial Measurements Information Object Description

The Ophthalmic Axial Measurements IOD is used to encode axial measurements of the eye made by an axial measurements device.

#### A.60.6.2 Ophthalmic Axial Measurements IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Ophthalmic Axial Measurements IOD.

#### A.60.6.3 Ophthalmic Axial Measurements IOD Module Table

Table A.60.6-1 specifies the Modules of the Ophthalmic Axial Measurements IOD.

Table A.60.6-1. Ophthalmic Axial Measurements IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Ophthalmic Axial Measurements Series | C.8.25.13 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | Ophthalmic Axial Measurements | C.8.25.14 | M
General Ophthalmic Refractive Measurements | C.8.25.7 | M
SOP Common | C.12.1 | M

### A.60.7 Intraocular Lens Calculations IOD

#### A.60.7.1 Intraocular Lens Calculations Information Object Description

The Intraocular Lens Calculations IOD is used to encode calculations performed by ophthalmic axial measurements devices or by standalone software. Data input to these calculations comes both from the devices and from other sources.

#### A.60.7.2 Intraocular Lens Calculations IOD Entity-Relationship Model

The E-R Model in Section A.1.2 applies to the Intraocular Lens Calculations IOD.

#### A.60.7.3 Intraocular Lens Calculations IOD Module Table

Table A.60.7-1 specifies the Modules of the Intraocular Lens Calculations IOD.

Table A.60.7-1. Intraocular Lens Calculations IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Intraocular Lens Calculations Series | C.8.25.15 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | M
Measurements | Intraocular Lens Calculations | C.8.25.16 | M
General Ophthalmic Refractive Measurements | C.8.25.7 | M
SOP Common | C.12.1 | M

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