Active clinical trials for "Vision Disorders"

Youth and some adults have photoscreening refractions and hand-held auto refraction before cycloplegia refraction during new and follow up eye examinations. Vector math is applied to each refraction to determine how closely the hand-held "dry" devices match actual refraction.

In an on-going study of visual characteristics of personnel diagnosed with a mild traumatic brain injury (MTBI) related to their service in Iraq and Afghanistan we found a high rate of binocular vision problems (such as double/blurry vision, reading difficult, etc.). These individuals are also usually diagnosed with post traumatic stress disorder (PTSD). PTSD is known to cause some vision symptoms. We wish to conduct this study on individuals with PTSD (but not an MTBI) to see if they have symptoms similar to those in individuals who have MTBI. This will provide us with information useful in determining the specific cause of the visual symptoms in the MTBI population.

The aim of the study is to assess accurancy of OCT angiography as a pronostic marker for patients undergoing neurosurgery for compressiver macroadenoma as compared with visual acuity, visual field and OCT.

The present research process is a prospective clinical study that will be conducted under the auspices of the Democritus University of Thrace (DUTH) in the open accommodation structure for refugees and immigrants of Kavala, Kavala, Greece, and the Pre-Removal Detention Center (PROKEKA) for Foreigners of Kos, Kos, Greece. The study aims to assess the basic ophthalmological condition of the refugee/immigrant population and is developed in two main areas: The recording of the ophthalmological care that the refugee/immigrant has received until his/her inclusion in the study through a structured questionnaire (eg previous examinations, spectacle utilization, pharmaceutical or other interventions, etc.) The measurement of monocular best-spectacle corrected visual acuity in both eyes using a web-based visual acuity chart. Adult participants living in the two aforementioned centers will be recruited in a consecutive-if-eligible basis. All age groups will be proportionally represented (proportional age distribution).

During recent years, the interest in studying the risks of being born moderate-to-late preterm (MLP), defined as birth between gestational week 32 to 36, has increased. Today the investigators know that morbidity and mortality are significantly higher in these individuals compared to individuals born full-term. However, few studies have focused on the development of the eye in MLP individuals. The purpose of the study is to evaluate eye morphology and visual function in relation to growth, metabolism, blood pressure, neuropsychiatric factors, and quality of life in adolescents born MLP. The results of the examinations will be compared to an age-matched control group. The study will evaluate the structural, functional, and metabolic aspects of the eye with the hypothesis that early eye abnormalities may detect the risk of developing metabolic and cardiovascular diseases.

The usability of a novel test to categorize a distorted visual impression (metamorphopsia) is examined with the questionnaire "SUS"

The aim of this study was to investigate the eye structure, visual impairment, visual motor development and motor coordination of children between 2-6 ages that had applied to diod laser photocoagulation and intravitreal anti - vascular endothelial growth factor treatment.

A multicentre, open-label, non-interventional study to observe treatment patterns in patients with wet age-related macular degeneration (wAMD), with visual impairment due to diabetic macular edema (DME), due to macular edema following retinal vein occlusion (RVO) or due to chorioidal neovascularization following pathologic myopia (mCNV) with repeated intravitreal injections of Lucentis® (Ranibizumab) including optional OCT monitoring over a 24 months observational period under real life conditions.

Patients with acute exacerbation of chronic headache disorder present frequently to the Emergency Department (ED) for pain management. A novel etiology of headaches is Vertical Heterophoria (VH), a poorly understood and little recognized binocular vision malady that when treated with realigning prismatic spectacle lenses results in marked reduction in headache and other associated VH symptoms. This study aims to determine the accuracy of the Vertical Heterophoria Symptom Questionnaire (VHSQ) in identifying a ED headache patients who will experience significant reduction in VH symptoms with use of realigning prismatic spectacle lenses. This study's secondary purpose is to determine if VH is a common cause of chronic headache disorders in ED headache patients. To achieve these goals, a prospective observational study will be performed on ED headache patients > 18 years old. All will be given the VHSQ, and all will be assessed for a diagnosis of VH by an optometrist who will utilize a novel VH testing method. High and low score groups on the VHSQ will then be compared to each other to determine the prevalence of VH in each.

The transient visual disturbances (TVD) are defined by a short abnormality of visual function. Their etiology may be ophthalmological, neurological non-ischemic or of ischemic origin. The difficulty is to recognize an ischemic mechanism which imposes emergency cares. A clinical score could help the clinician to recognize the etiology of the TVD .