Active clinical trials for "Corneal Diseases"

The purpose of this study is to evaluate the safety and performance of the EYEMATE system in patients undergoing concomitant implantation of a BKPro type 1 and an EYEMATE sensor over the 24 months period beginning at implantation.

60% of the patients hospitalized in intensive care and sedated suffer from insufficient inferior eyelid occlusion. Thus, they are at risk for corneal damage (estimated risk 20% to 57%). The prevention of such corneal damage can be done using several techniques (artificial tears, eyelid occlusion dressing, aqueous gel). The efficacy of these techniques has never been compared in a rigorous study. Therefore it is not yet possible to determine an evidence-based strategy to prevent corneal damage in intensive care patients. This study aims at assessing the efficacy of primary prevention of corneal lesions in intensive care patients, in order to elaborate an evidence-based nursing protocol.

Constructs made from cross-linked Human Recombinant Collagen type III are being used instead of human donor corneas in 6 patients at Deep anterior lamellar cornea grafting. Six patients serve as controls and are receiving human donor corneas using the same surgical technique. The twelve patients will be recruited from the local waiting list for patients to be undergoing corneal grafting. If the patients meet the inclusion criteria and agree to participate following oral and written consent, they will be randomized to either group. The patients will be followed for 12 months and documented with OCT, In Vivo Confocal Microscopy, slit lamp photography a o. The study is planned as a safety study with initial efficacy documentation.

The purpose of this study is to compare the relative efficacy of four different treatment modalities (i.e. aggressive lubrication, bandage contact lens, Ambiodisk amniotic membrane, Prokera amniotic membrane) in the healing of persistent corneal epithelial defects following retina surgery.

Prospective, randomized, single site to determine the safety and effectiveness of performing corneal collagen cross-linking (CXL) using riboflavin and UVA light in eyes progressive keratoconus or corneal ectasia.

Optical Coherence Tomography (OCT) image data will be evaluated for image quality and used to test post-processing algorithms to improve detection sensitivity for ophthalmic diseases.

The aim of this pilot study is to assess the ability of a new optical coherence tomography system to obtain information on biomechanics of the cornea.

The Cornea Donor Study (CDS) was designed as a prospective cohort study with the following objectives: To determine whether the graft-failure rate over a 5-year follow-up period following corneal transplantation is the same when using corneal tissue from donors older than 65 years of age compared with tissue from younger donors. To assess the relationship between donor/recipient ABO blood type compatibility and graft failure due to rejection. To assess corneal endothelial cell density as an indicator of the health of the cornea and as a alternate outcome measure (in an optional Specular Microscopy Ancillary Study).

The purpose of this project is to diagnose and evaluate ocular and related tissues with various diseases such as conjunctival, corneal, uveal, vitreoretinal and optic nerve disorders, ocular degenerative, metabolic or genetic diseases and tumors. These will be studied using light microscopy, electron microscopy, confocal microscopy, immunohistochemistry, molecular pathological including polymerase chain reaction and in situ hybridization, as well as measuring the functions of cellular organelles, e.g., mitochondrial function. Lymphocytes in the peripheral blood as well as other involved biopsied tissues and ocular tissue will be compared and categorized by disease. Cytokines, chemokines or growth factors and/or other released molecules in the blood and ocular fluids will be also analyzed. Elucidating the relationship between the infiltrating cells, ocular resident cells, and their products in various diseases will help us to make diagnoses and increase our understanding of human ocular disorders. Patients who require eye surgery to treat an eye disease or other disease in which the eye is involved may participate in this study. Samples of eye tissue and fluid that are normally removed and discarded during eye surgery will instead be given to researchers for study. The tissues will be examined under microscope and studied using sophisticated chemical and biological tests. Immune cells from blood samples may also be examined. These studies will help better understand and diagnose the various eye diseases and to develop more attractive therapies.

The purpose of this study is to compare the effects of autologous serum 20% and autologous serum 50% for the treatment of Severe Dry Eye Syndrome