View clinical trials related to Visual Acuity.
Filter by:The aim of this study was to evaluate the role of 25-gauge transconjuntival sutureless vitrectomy (TSV) in patients with persistent vitreous floaters who underwent multifocal intraocular lens (IOL) implantation.
The purpose of this study is to assess uniocular and binocular unaided distance, intermediate, and near VA; contrast sensitivity, accommodation amplitude, stereopsis, glare testing, ocular aberrations and the clinical satisfaction assessment after bilateral implant of the Restor IOL.
Our goal is to study the relationship between intraocular pressure during robotic prostatectomy surgery and visual deficiencies/vision loss after surgery. We believe the risk of vision loss from this surgery to be due to positioning during the operation, as well as abdominal carbon dioxide insufflation. As robotic procedures are gaining in popularity, we should determine whether they are subjecting this patient population, and perhaps more likely the patient with a preoperative diagnosis of glaucoma, to an increased likelihood of postoperative visual disturbance.If our hypothesis that intraocular pressure is increased in these patients is confirmed, future studies will assess therapeutic modalities to maintain the IOP near baseline.
This study involves the use of VisionQuest 20/20 which is a new software program to test visual acuity in children. The purpose of this study is to compare the results of VisionQuest 20/20 to two other ways to measure visual acuity. The two other tests are a standard eye exam by an ophthalmologist and electronic visual acuity (EVA) testing, a computerized version of a standard eye test. It is important to identify vision problems in children as early as possible. These problems include amblyopia ("lazy eye," or reduced vision due to lack of development in the visual area of the brain), strabismus (eyes are not aligned correctly due to eye muscle problems), and refractive errors (when you need glasses to see up close or far away). Early identification of the vision problems allows them to be treated earlier which makes it more likely that vision can be improved. VisionQuest 20/20 can be easily distributed to schools, and it is easy for the child and the vision screener to use. The test can be performed by volunteers instead of an ophthalmologist.