CorVision® 4-year Follow-up (CorVision4yFU)
28 de mayo de 2026 actualizado por: Katerina Klimesova, Gemini Eye Clinic
Four Years Extended Follow-Up on CorVision® Bioengineered Corneal Microlens: Safety and Efficacy
The objective of the study is to assess the long-term safety and effectiveness of the CorVision® microlens implanted in presbyopic patients for the management of management of presbyopia and near vision impairment.
Approximately 100 patients in the Czech Republic will participate in this study.
The study was reviewed and approved by an independent research ethics committee and also by the State Institute for Drug Control (SÚKL).
The study will consist of a single visit during which standard, non-invasive, and painless examinations will be performed.
This visit will correspond to the 4-year follow-up visit of the original clinical trial.
Descripción general del estudio
Estado
Terminado
Condiciones
Tipo de estudio
De observación
Inscripción (Actual)
95
Contactos y Ubicaciones
Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.
Ubicaciones de estudio
-
-
-
Zlín, Chequia, 760 01
- Gemini Eye Clinic
-
-
Criterios de participación
Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.
Criterio de elegibilidad
Edades elegibles para estudiar
- Niño
- Adulto
- Adulto Mayor
Acepta Voluntarios Saludables
No
Método de muestreo
Muestra no probabilística
Población de estudio
The target population are patients who suffered from presbyopia and underwent the original CorVision clinical study are medically suitable to undertake the current clinical study investigation.
Descripción
Inclusion Criteria:
- Subjects must have undergone implantation of CorVision microlens under study protocol CMG-PRT-002.
- Provide informed consent
- Willing to participate in the ophthalmological examinations
Exclusion Criteria:
- Patients with severe ocular or general disorders that would prevent them from completed the visit.
- Patients not being able to understand and give informed consent.
Plan de estudios
Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.
¿Cómo está diseñado el estudio?
Detalles de diseño
Cohortes e Intervenciones
Grupo / Cohorte |
|---|
|
Post-presbyopia correction with unilaterally implanted microlens
Presbyopic patients who have undergone implantation of the CorVision microlens according to study protocol CMG-PRT-002.
|
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Uncorrected Near Visual Acuity of 0.3 logMAR or better
Periodo de tiempo: At least 4 years after the implantation
|
More than 65% of the eyes should have an Uncorrected Near Visual Acuity (UNVA) of 0.3 logMAR or better at 4 years postoperatively.
|
At least 4 years after the implantation
|
|
Implant removal
Periodo de tiempo: At least 4 years after the implantation
|
The incidence of implant rejection leading to implant removal should occur in no more than 3% of implanted eyes.
|
At least 4 years after the implantation
|
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Clinically significant corneal haze occurrence
Periodo de tiempo: At least 4 years after the implantation
|
Clinically significant corneal haze is defined as any new stromal clouding in or near the laser-created pocket that leads to a reduction in central corneal clarity/transparency, is visible upon slit-lamp examination, and is graded as ≥ 2 on a standardized corneal haze grading scale.
|
At least 4 years after the implantation
|
Otras medidas de resultado
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Monocular Uncorrected Near Visual Acuity at Best Reading Distance
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular uncorrected near visual acuity and best reading distance over time
|
At least 4 years after the implantation
|
|
Monocular and Binocular Uncorrected Near Visual Acuity at 40 cm
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular and binocular Uncorrected Near Visual Acuity (UNVA) at 40 cm.
|
At least 4 years after the implantation
|
|
Monocular and Binocular Distance Corrected Near Visual Acuity
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular and binocular Distance Corrected Near Visual Acuity (DCNVA).
|
At least 4 years after the implantation
|
|
Monocular and Binocular Corrected Near Visual Acuity
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular and binocular Corrected Near Visual Acuity (CNVA) over time.
|
At least 4 years after the implantation
|
|
Monocular and Binocular Uncorrected Intermediate Visual Acuity (UIVA)
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular and binocular Uncorrected Intermediate Visual Acuity (UIVA) over time.
|
At least 4 years after the implantation
|
|
Monocular and Binocular Distance Corrected Intermediate Visual Acuity
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular and binocular Distance Corrected Intermediate Visual Acuity (DCIVA) over time.
|
At least 4 years after the implantation
|
|
Monocular and Binocular Uncorrected Distance Visual Acuity (UDVA)
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular Uncorrected Distance Visual Acuity (UDVA) over time.
|
At least 4 years after the implantation
|
|
Monocular and Binocular Corrected Distance Visual Acuity (CDVA)
Periodo de tiempo: At least 4 years after the implantation
|
Change in monocular and binocular Corrected Distance Visual Acuity (CDVA) over time.
|
At least 4 years after the implantation
|
|
Objective refraction
Periodo de tiempo: At least 4 years after the implantation
|
Change in objective refractive sphere and cylinder magnitude measured by autorefractometry.
|
At least 4 years after the implantation
|
|
Subjective refraction
Periodo de tiempo: At least 4 years after the implantation
|
Change in manifest refractive sphere and cylinder magnitude, measured in diopters (D).
|
At least 4 years after the implantation
|
|
Near addition
Periodo de tiempo: At least 4 years after the implantation
|
Change in near addition values over time.
|
At least 4 years after the implantation
|
|
Corneal Keratometry Measurements (K1, K2, and Kmean)
Periodo de tiempo: At least 4 years after the implantation
|
Change in corneal keratometry values, including K1, K2, and mean keratometry (Kmean), as measured by corneal topography over time. Change in keratometry K1, K2 and Kmean measured in diopters over time. |
At least 4 years after the implantation
|
|
Central Corneal Thickness (Pachymetry) Measurement
Periodo de tiempo: At least 4 years after the implantation
|
Change in central corneal thickness as measured by corneal pachymetry over time.
|
At least 4 years after the implantation
|
|
Endothelial Cell Density (Study Eye)
Periodo de tiempo: At least 4 years after the implantation
|
Change in endothelial cell density over time.
|
At least 4 years after the implantation
|
|
Intraocular Pressure (Study Eye)
Periodo de tiempo: At least 4 years after the implantation
|
Change in intraocular pressure over time.
|
At least 4 years after the implantation
|
|
Tear Film Break-Up Time (TBUT) Test
Periodo de tiempo: At least 4 years after the implantation
|
Change in tear film stability as measured by Tear Film Break-Up Time (TBUT) in units of seconds.
|
At least 4 years after the implantation
|
|
Tear Production (Schirmer Test)
Periodo de tiempo: At least 4 years after the implantation
|
Change in tear production as measured by the Schirmer test in units of mm.
|
At least 4 years after the implantation
|
|
Corneal Thickness Measurement Using Optical Coherence Tomography (OCT)
Periodo de tiempo: At least 4 years after the implantation
|
Change in corneal thickness measured at the corneal center in μm.
|
At least 4 years after the implantation
|
|
Abnormal findings at OCT
Periodo de tiempo: At least 4 years after the implantation
|
Incidence of abnormal findings on OCT.
|
At least 4 years after the implantation
|
|
Slit-lamp findings
Periodo de tiempo: At least 4 years after the implantation
|
Incidence of abnormal slit lamp findings (eyelid, conjunctiva, epithelium, stroma, central cornea clarity, cornea neovascularization, anterior chamber, iris, lens).
|
At least 4 years after the implantation
|
|
Contrast sensitivity
Periodo de tiempo: At least 4 years after the implantation
|
Determination of contrast sensitivity measured by CSV 1000 (Vector Vision) (changes from the pre-operative to the post-operative state and its stability over time will be investigated).
|
At least 4 years after the implantation
|
|
Defocus curve
Periodo de tiempo: At least 4 years after the implantation
|
Change in visual acuity measured at different defocus vergence levels during monocular defocus curve testing over time.
|
At least 4 years after the implantation
|
|
Aberrometry measurements using iTrace
Periodo de tiempo: At least 4 years after the implantation
|
Change in the total higher order aberrations (HOA) assessed by iTrace.
|
At least 4 years after the implantation
|
|
Subjective questionnaire QoV - patient satisfaction
Periodo de tiempo: At least 4 years after the implantation
|
Evaluation of patient satisfaction assessed on a scale
|
At least 4 years after the implantation
|
|
Subjective questionnaire QoV
Periodo de tiempo: At least 4 years after the implantation
|
Evaluation of patient satisfaction as assessed using the Quality of Vision (QoV) questionnaire scoring scale.
|
At least 4 years after the implantation
|
|
Adverse events incidence
Periodo de tiempo: At least 4 years after the implantation
|
Intraoperative and adverse events at each time point (numbers and percentages)
|
At least 4 years after the implantation
|
Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Publicaciones y enlaces útiles
La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.
Fechas de registro del estudio
Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.
Fechas importantes del estudio
Inicio del estudio (Actual)
27 de junio de 2025
Finalización primaria (Actual)
25 de noviembre de 2025
Finalización del estudio (Actual)
25 de noviembre de 2025
Fechas de registro del estudio
Enviado por primera vez
15 de mayo de 2026
Primero enviado que cumplió con los criterios de control de calidad
28 de mayo de 2026
Publicado por primera vez (Actual)
3 de junio de 2026
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
3 de junio de 2026
Última actualización enviada que cumplió con los criterios de control de calidad
28 de mayo de 2026
Última verificación
1 de mayo de 2026
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- CMG-PRT-002-1
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
No
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
No
Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .