View clinical trials related to Epiretinal Membrane.
Filter by:This prospective randomized controlled trial will be conducted to investigate Clareon intraocular lens (IOL) stability in vitrectomy patients. The investigator plans to target the patients undergoing cataract surgery. A randomized study will be conducted with 2 arms, one with Clareon IOL versus a second arm using the Tecnis 1 In this non-inferiority study, the investigator will compare Clareon IOL from Alcon with the existing Tecnis 1 IOL from Precision Lens which is the commonly used intraocular lens in combined vitrectomy cases in Hong Kong.
Various classification systems have been described for epiretinal membrane (ERM). One of them is a new OCT-based staging scheme based on displacement and reorganization of inner retinal layers called ectopic inner retinal layers (EIFL). We evaluated pre-and perioperative factors related to time for evolution of EIFL.
This prospective randomised controlled trial will be conducted to investigate that increasing the vitrectomy cutting rate from 10,000 cut/min to 20,000 cut/min will result more efficiency and shorter core vitrectomy time, and it is equally safe as compared to the current 10,000 cut/min. We plan to target the patients undergoing for vitrectomy for common vitreoretinal pathology. Our plan is to conduct a randomised study with 2 arms, one with the higher cutting rate (20,000 cut/min) versus a second arm using the existing system 10,000 cuts/min.
In this study, the investigators aim to collect data regarding the efficiency and safety of two dyes used intraoperatively in vitrectomy to stain intraocular tissues. These products have the necessary approvals to use during such operation,These are NOT experimental products.
In this study, the investigators will make the only upper flap either from the internal limiting membrane or from the epiretinal membrane to cover the full thickness macular hole.
Many patients will have underlying maculopathy present when undergoing cataract surgery, which are not visible on fundoscopy alone. Knowledge of this underlying pathology will allow an improved consenting process and discussion with the patient regarding the risks, visual prognosis and recovery following cataract surgery. Incidental findings in the fellow eye would also allow for improved diagnosis and management of these patients without adding significant additional time to specialist high volume cataract assessment clinics.
Main objective The objective is to compare two surgical options in vitrectomies for epiretinal membranes using parameters of optical coherence tomography angiography. Background State of the art treatment for epiretinal membranes consists of pars plana vitrectomy, staining of the epiretinal membrane with a blue colouring dye and epiretinal membrane peeling. The vitrectomized space is filled with fluid (balanced salt solution) during the procedure and the fluid can optionally be replaced with air as a final step. After ERM peeling (but before the selection of the tamponade), the internal limiting membrane (the innermost layer of the retina) is either peeled as well or left untouched and the question which method should be preferred has been a hot topic in recent years. The investigators want to investigate possible effects of the used method (peeling vs. nonpeeling) on retinal perfusion parameters represented by OCTA. Two epiretinal membrane patient groups will therefore be formed: The first group's (group 1) ILM will be peeled, the second group's (group 2) ILM will not be peeled. After recruitement, patients will therefore be electronically randomized to one of the two groups. The groups will then be compared by the means of OCTA. Study design - Since there are no previous data on our research question, this investigation is defined as a pilot study. - 40 patients with epiretinal membranes will be included. This appears to be a reasonable number given the incidence of epiretinal membranes. Previous studies that compared peeling versus nonpeeling in ERM used similar sample sizes. The detectable effect size was calculated at d = 0.91. We intend to complete this pilot study within 9 months. - Randomization will be performed using electronic randomization. 20 patients each will be randomized to either group 1 or group 2. - Both eyes in each patient will be imaged. - No treatment decisions will be made based on OCTA findings. Treatment decisions will be made according to the clinic's standard of care. - Three follow-up visits specific to the study are needed. These visits will be scheduled one week, one month and three months after surgery. All other preoperative and follow-up visits will be decided by the treating physician and follow the clinic standard of care. Examinations - Distance visual acuity using ETDRS (Early Treatment Diabetic Retinopathy Study) standard at 4 meters as per clinic standard of care. - Tonometry as per clinic standard of care. - Slit-lamp evaluation as per clinic standard of care. - Arterial blood pressure. - Axial eye length. - Heidelberg Spectralis conventional OCT. - The following 2 AngioVue scans will be taken: A. One 3mm x 3mm, 304 x 304 A-scan OCTA of the macula B. One 6mm x 6mm, 304 x 304 A-scan OCTA of the macula Hypothesis The null hypothesis of our investigation indicates that there are no statistically significant differences in OCTA perfusion parameters based on the used option. The alternative hypothesis states that there are statistically significant differences in OCTA perfusion parameters based on the used option. Primary Objective To demonstrate possible differences in OCTA perfusion parameters based on the used option. Secondary Objectives To assess the feasibility of the AngioVue optical coherence tomography angiography system in evaluating subtle changes in the retinal perfusion of patients with epiretinal membranes.
Assessing metamorphopsia and quality of vision pre and post epiretinal and macular hole surgery
This is a prospective, Open-label, comparative clinical study to asses two brilliant blue G dyes as staining agent in Vitro Retinal Surgery.
Several optical coherence tomography (OCT) biomarkers with potential to influence postsurgical outcomes after vitrectomy with membrane peeling for idiopathic epiretinal membranes (iERM) have been described in single predictor analyses in the past. Aim of the study is to assess the reliability of diagnosis of OCT biomarkers and to calculate their impact on postsurgical visual acuity in a multiple regression analysis.