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Aim of this study is to conduct longitudinal and cross-sectional analyses about the corneal ectatic disease Keratoconus based on data obtained from Keratoconus patients in the Homburg Keratoconus Center (HKC).
The Homburg Keratoconus Center (HKC) was founded in 2010 and, up to now, comprises more than 3,000 Keratoconus patients. Topographic, tomographic and biomechanic characteristics of the disease are being analyzed with the intention to elucidate how the disease begins and develops during lifetime.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Patients with Keratoconus | Aim is to include as many Keratoconus patients as possible with the intention to elucidate how the disease begins and develops during lifetime. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Topographic, tomographic and biomechanical analysis. | Diagnostic Test | The study is based upon data obtained during routine medical follow-ups using
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| Measure | Description | Time Frame |
|---|---|---|
| An overview about development of anterior corneal curvature in Keratoconus disease during lifetime. | The anterior radius of curvature (ARC, 3mm zone) of Keratoconus patients as measured by the Pentacam high resolution (Oculus, Wetzlar, Germany) at different ages (according to: Belin MW and Duncan JK. Keratoconus: The ABCD grading system. Klin Monbl Augenheilkd. 2016; 233(6): 701-707) is put into relation to the age of the Keratoconus patients. | 01/01/2011-01/01/2019 |
| An overview about development of posterior corneal curvature in Keratoconus disease during lifetime. | The posterior radius of curvature (PRC, 3mm zone) of Keratoconus patients as measured by the Pentacam high resolution (Oculus, Wetzlar, Germany) at different ages (according to: Belin MW and Duncan JK. Keratoconus: The ABCD grading system. Klin Monbl Augenheilkd. 2016; 233(6): 701-707) is put into relation to the age of the Keratoconus patients. | 01/01/2011-01/01/2019 |
| An overview about development of the thinnest corneal pachymetry in Keratoconus disease during lifetime. | The thinnest corneal pachymetry of Keratoconus patients as measured by the Pentacam high resolution (Oculus, Wetzlar, Germany) at different ages (according to: Belin MW and Duncan JK. Keratoconus: The ABCD grading system. Klin Monbl Augenheilkd. 2016; 233(6): 701-707) is put into relation to the age of the Keratoconus patients. | 01/01/2011-01/01/2019 |
| An overview about development of the best corrected distance visual acuity in Keratoconus disease during lifetime. | The best corrected distance visual acuity of Keratoconus patients as raised as part of the clinical examination at different ages (according to: Belin MW and Duncan JK. Keratoconus: The ABCD grading system. Klin Monbl Augenheilkd. 2016; 233(6): 701-707) is put into relation to the age of the Keratoconus patients. | 01/01/2011-01/01/2019 |
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Inclusion Criteria:
Exclusion Criteria:
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Keratoconus patients of all ages presenting in the department of ophthalmology, Saarland University Medical Center, Homburg, Saarland, Germany, should be included.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Ophthalmology | Recruiting | Homburg | Saarland | 66421 | Germany |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 38946004 | Result | Flockerzi E, Seitz B. Keratectasia severity staging and progression assessment based on the biomechanical E-staging. Eye Vis (Lond). 2024 Jul 1;11(1):24. doi: 10.1186/s40662-024-00392-3. | |
| 37458424 | Result | Sideroudi H, Flockerzi E, Daas L, Jullien T, Xanthopoulou K, Hamon L, Seitz B. Baseline Characteristics of 1976 Patients With Ectatic Corneal Disorders at a Single Center From 2010 to 2021: A Cross-Sectional Study of the Homburg Keratoconus Center. Eye Contact Lens. 2023 Sep 1;49(9):392-398. doi: 10.1097/ICL.0000000000001014. Epub 2023 Jul 14. |
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| ID | Term |
|---|---|
| D007640 | Keratoconus |
| ID | Term |
|---|---|
| D003316 | Corneal Diseases |
| D005128 | Eye Diseases |
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|
| Reproducibility study: Kmax. |
Measurements of Kmax measured by different devices (Pentacam high resolution, Oculus, Wetzlar, Germany; Anterior-Segment Optical Coherence Tomograph (AS-OCT) Casia 2, Tomey, Nagoya, Japan) are being compared and set into relation at different Keratoconus stages with the intention to investigate, whether measurement inaccuracies occur at later Keratoconus stages using different devices. |
| 01/01/2011-01/01/2019 |
| Reproducibility study: Thinnest corneal pachymetry. | Measurements of the thinnest corneal pachymetry as measured by different devices (Pentacam high resolution, Oculus, Wetzlar, Germany; Anterior-Segment Optical Coherence Tomograph (AS-OCT) Casia 2, Tomey, Nagoya, Japan) are being compared and set into relation at different Keratoconus stages with the intention to investigate, whether measurement inaccuracies occur at later Keratoconus stages using different devices. | 01/01/2011-01/01/2019 |
| Reproducibility study: Thinnest corneal pachymetry at the apex position. | Measurements of the thinnest corneal pachymetry at the apex position as measured by different devices (Pentacam high resolution, Oculus, Wetzlar, Germany; Anterior-Segment Optical Coherence Tomograph (AS-OCT) Casia 2, Tomey, Nagoya, Japan) are being compared and set into relation at different Keratoconus stages with the intention to investigate, whether measurement inaccuracies occur at later Keratoconus stages using different devices. | 01/01/2011-01/01/2019 |
| 34655452 | Result | Flockerzi E, Vinciguerra R, Belin MW, Vinciguerra P, Ambrosio R Jr, Seitz B. Combined biomechanical and tomographic keratoconus staging: Adding a biomechanical parameter to the ABCD keratoconus staging system. Acta Ophthalmol. 2022 Aug;100(5):e1135-e1142. doi: 10.1111/aos.15044. Epub 2021 Oct 16. |
| 34633357 | Result | Flockerzi E, Elzer B, Daas L, Xanthopoulou K, Eppig T, Langenbucher A, Seitz B. The Reliability of Successive Scheimpflug Imaging and Anterior Segment Optical Coherence Tomography Measurements Decreases With Increasing Keratoconus Severity. Cornea. 2021 Nov 1;40(11):1433-1439. doi: 10.1097/ICO.0000000000002657. |
| 34321407 | Result | Flockerzi E, Vinciguerra R, Belin MW, Vinciguerra P, Ambrosio R Jr, Seitz B. Correlation of the Corvis Biomechanical Factor with tomographic parameters in keratoconus. J Cataract Refract Surg. 2022 Feb 1;48(2):215-221. doi: 10.1097/j.jcrs.0000000000000740. |
| 33750037 | Result | Flockerzi E, Hafner L, Xanthopoulou K, Daas L, Munteanu C, Langenbucher A, Seitz B. Reliability analysis of successive Corneal Visualization Scheimpflug Technology measurements in different keratoconus stages. Acta Ophthalmol. 2022 Feb;100(1):e83-e90. doi: 10.1111/aos.14857. Epub 2021 Mar 22. |
| 32830125 | Result | Flockerzi E, Xanthopoulou K, Goebels SC, Zemova E, Razafimino S, Hamon L, Jullien T, Kluhspies U, Eppig T, Langenbucher A, Seitz B. Keratoconus staging by decades: a baseline ABCD classification of 1000 patients in the Homburg Keratoconus Center. Br J Ophthalmol. 2021 Aug;105(8):1069-1075. doi: 10.1136/bjophthalmol-2020-316789. Epub 2020 Aug 23. |
| 38648457 | Derived | Flockerzi E, Berger T, Seitz B, Hamon L, Daas L. Evaluation of dynamic corneal response parameters and the biomechanical E-staging after Intacs(R) SK implantation in keratoconus. Indian J Ophthalmol. 2024 May 1;72(Suppl 3):S495-S500. doi: 10.4103/IJO.IJO_2944_23. Epub 2024 Apr 20. |
| 36417675 | Derived | Flockerzi E, Xanthopoulou K, Daas L, Feld S, Langenbucher A, Seitz B. Evaluation of Dynamic Corneal Response Parameters and the Biomechanical E-Staging After Accelerated Corneal Cross-Linking in Keratoconus. Asia Pac J Ophthalmol (Phila). 2022 Nov 1;11(6):514-520. doi: 10.1097/APO.0000000000000580. |