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The purpose of this study is to determine if the keratometric functions of the VERION Image Guided System are comparable to those of established keratometric devices (IOLMaster 500, Pentacam HR, LenStar LS900). Calculated intraocular lenses (IOLs) are compared as a clinical consequence of the biometric measurement for IOLMaster 500, LenStar LS900 and VERION Image Guided System.
In addition the comfort and duration of examination in the different devices is evaluated.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Opthalmologically healthy individuals | Other | Slit lamp, Autorefractor, IOLMaster 500, Pentacam HR, LenStar LS900, VERION Image Guided System |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Slit lamp | Device | Examination of cornea |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Accuracy of repeatability of keratometry as performed by VERION Image Guided System | 3 immediate repetitions at study visit (study consists of 1 visit only) |
| Measure | Description | Time Frame |
|---|---|---|
| Subjective comfort for test persons as evaluated by questionnaire | Immediately after study visit (study consists of 1 visit only) | |
| Duration of measurements of each keratometric device as taken by stopwatch | During measurements from placement of head until completion |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Mike P Holzer, MD, FEBO | Department of opthalmology, University of Heidelberg | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of ophthalmology, University of Heidelberg | Heidelberg | Baden-Wurttemberg | 69120 | Germany |
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| ID | Term |
|---|---|
| D064090 | Intraocular Lymphoma |
| ID | Term |
|---|---|
| D008223 | Lymphoma |
| D009370 | Neoplasms by Histologic Type |
| D009369 | Neoplasms |
| D005134 | Eye Neoplasms |
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| ID | Term |
|---|---|
| D066167 | Slit Lamp |
| ID | Term |
|---|---|
| D019721 | Ophthalmoscopes |
| D019719 | Diagnostic Equipment |
| D004864 | Equipment and Supplies |
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| Autorefractor |
| Device |
Measurement of refraction |
|
| IOLMaster 500 | Device | Measurement of axial length and white-to-white distance; Keratometry; IOL calculation |
|
| Pentacam HR | Device | Measurement of white-to-white distance; Keratometry |
|
| LenStar LS900 | Device | Measurement of axial length and white-to-white distance; Keratometry; IOL calculation |
|
| VERION Image Guided System | Device | Measurement of white-to-white distance; Keratometry; IOL calculation with axial length value of IOLMaster 500 |
|
| Keratometric values as measured by IOLMaster 500, Pentacam HR, LenStar LS900, VERION Image Guided System | At study visit (study consists of 1 visit only) |
| White-to-White distance as measured by IOLMaster 500, Pentacam HR, LenStar LS900, VERION Image Guided System | At study visit (study consists of 1 visit only) |
| Intraocular lens calculation as performed by IOLMaster 500, LenStar LS900, VERION Image Guided System | Immediately after measurement |
| D009371 |
| Neoplasms by Site |
| D008232 | Lymphoproliferative Disorders |
| D008206 | Lymphatic Diseases |
| D006425 | Hemic and Lymphatic Diseases |
| D007160 | Immunoproliferative Disorders |
| D007154 | Immune System Diseases |