View clinical trials related to Vision Disorders.
Filter by:This study is undertaken to determine the effect of intravitreal long acting dexamethasone implant, (Ozurdex®) in improving outcome of cataract surgery in patients with diabetic macular edema. Diabetic Macular Edema and cataract constitute important causes of visual impairment in patients with diabetes. Cataract surgery in patients with diabetic retinopathy is associated with progression of retinopathy. Several modalities such as non-steroidal anti-inflammatory agents, carbonic anhydrase inhibitors, corticosteroids, hyperbaric oxygen, laser photocoagulation and vitrectomy with internal limiting membrane peeling have been tried for managing inflammatory cystoid macular edema. Intravitreal Triamcinolone Acetonide (TA), a water insoluble steroid, has been shown to reduce the retinal thickness and improve the visual acuity. However, recurrence of macular edema in patients who receive intravitreal TA is a major concern as the patients need multiple repeat injections. In search for the ideal corticosteroid preparation, a Dexamethasone Posterior Segment Drug Delivery System (Dexamethasone DDS - Ozurdex®, Allergan Inc, Irvine, California) was recently developed. Promising results have been shown in certain patients with persistent diabetic macular edema receiving this intravitreal drug delivery system with improvement in visual acuity The present study introduces a novel concept of using intraoperative Ozurdex ® implant in patients with diabetes mellitus while undergoing cataract surgery to minimize the worsening of diabetic maculopathy.
This clinical trial is designed to compare ranibizumab in comparison with Dexamethasone implant® after 6 months of treatment. In the study arm Lucentis will be given monthly in a pro re nata scheme whereas the comparator Dexamethasone implant is given once at Month 0 with sham injections PRN afterwards.
The purpose of this study is to provide efficacy and safety data of 3 consecutive monthly intravitreal injections with 0.5 mg ranibizumab in Japanese patients with visual impairment due to macular edema secondary to retinal vein occlusion (BRVO or CRVO) to support the applicability of the phase III study results of BRAVO and CRUISE in this indication, in the Japanese ethnic patients.
The objective of this study is to evaluate the safety and efficacy of a new investigational cleaning and disinfecting solution (Test) compared to Clear Care cleaning and disinfecting solution (Control) when used by contact lens wearers to clean and disinfect their contact lenses for approximately three months.
The purpose of this study is to evaluate the proportion of patients with a 10 letters gain on Best Corrected Visual Acuity (BCVA) at 6 months in current medical practice.
Non-invasive brain stimulation can increase cortical excitability in the visual system, but it is not known if this is of clinical value. The investigators now assessed if repetitive, transcranial alternating current stimulation (rtACS) can improve visual field size in patients with optic nerve damage. The investigators hypothesized that rtACS would improve visual functions with the defective visual field sectors of the visual field (primary outcome measure).
Gynecologic Oncology patients have several different chemotherapy regimens, and dexamethasone is now routinely given to prevent allergic reactions to the chemotherapeutic agents. The most common chemotherapeutic agents used are paclitaxel and carboplatin. This combination regimen is given every three weeks for a total of 5-6 doses. Each dose is given after administration of 20 mg dexamethasone twelve hours prior to and the morning of chemotherapy. Dexamethasone is used for its antiemetic effects, but also to minimize the potentially fatal hypersensitivity reaction that can occur with paclitaxel. Another commonly used chemotherapy regimens is weekly cisplatin given with one dose of dexamethasone for cervical cancer. Chronic steroids are known to cause adrenal suppression, but it is not known if the amount of dexamethasone given with the gynecologic cancer chemotherapy regimens described above causes adrenal insufficiency in these patients. The investigators hypothesis is that some women receiving steroids with their chemotherapy may have adrenal insufficiency, and that they will have greater than normal chemotherapy-related fatigue.
The aim of the study is to compare the results of a parathyroid hormone (PTH)suppression test using a single oral tablet of cinacalcet in two groups of subjects: 1- a group of healthy adults in whom the results of the test with cinacalcet will be compared with those of the standardized PTH suppression test with intravenous calcium loading; 2- a group of patients with proven primary hyperparathyroidism in whom the results of the test with cinacalcet will be compared with those obtained during the same test, in healthy controls.
This study is being conducted to evaluate Bausch & Lomb PureVision Multi-Focal contact lenses compared to the Bausch & Lomb SofLens59 contact lens when worn by adapted soft contact lens wearers on a daily wear basis.
This study will assess the efficacy and safety of ranibizumab (intravitreal injections) versus laser treatment in patients with visual impairment due to diabetic macular edema.