Active clinical trials for "Eye Abnormalities"

The purpose of this study is to evaluate the safety and tolerability of QR-421a administered via intravitreal injection (IVT) in subjects with Retinitis Pigmentosa (RP) due to mutations in exon 13 of the USH2A gene.

The UK government's Crown report titled 'Review of prescribing, supply & administration of medicines' enabled optometrists to train for the qualification of independent prescribing (IP). The UK introduced IP for optometrists in 2009. The proposed research focuses on the role of IP optometrist in the acute ophthalmic services of Manchester Royal Eye Hospital (MREH). The study will compare IP optometrists to consultant ophthalmologists in the ability to diagnose, manage and prescribe medication for patients accessing these services. To achieve this comparison consenting participants will first have a clinical assessment with the IP Optometrist, where findings including diagnosis and management plan will be recorded onto a research proforma. The consultant ophthalmologist will be masked to the IP Optometrist's research proforma to prevent bias. The consultant ophthalmologist will then perform a clinical assessment on a second proforma and inform the participant of their diagnosis and management plan. Percentage agreement, kappa (κ) and weighted κ will be calculated for a range of parameters between the two proformas. Disagreement in diagnosis or management will be arbitrated by a separate ophthalmologist participating in the study with a specialty relevant to the participant's condition. The main objective of the research is to expand the limited base of evidence of of IP optometrists' ability to diagnose, manage and prescribe medication and to determine whether they work at least as safely and effectively as consultant ophthalmologists in acute ophthalmic services. It is the first study in this area since the advent of IP for optometrists, with only one previous study published before IP was introduced. The research will enable the type and frequency of conditions presenting in these services to be measured. Furthermore it will identify conditions that IP optometrists can manage independently and enable guidelines for these conditions to be developed.

Brittle Cornea Syndrome and Ehlers-Danlos Syndrome (EDS) type VI are rare collagen-connective tissue disorders that predispose affected individuals to the development of perforated corneas from the mildest of eye trauma or even spontaneously. Clinical studies evaluating riboflavin-corneal crosslinking have found that it dramatically increases corneal rigidity. Given the success and safety of riboflavin crosslinking, the investigators believe that it can increase the corneal stability in patients affected these disseases, preventing perforation. It is furthermore possible, that riboflavin crosslinking will allow corneal transplants to successfully be performed on blind eyes that have already perforated and opacified. The purpose of the study is to determine whether corneal crosslinking can be safely performed on individuals with Brittle Cornea Syndrome or Ehlers-Danlos Syndrome type VI.

This is a prospective clinical study that will be conducted at one clinical site located in the United States to assess image quality of acquired biometry images of the eye

The International Cohort Study of Children Born to Women Infected with Zika Virus (ZIKV) During Pregnancy study is a prospective, observational, international cohort study of children previously enrolled in the ZIP study or other ZIP 2.0 Protocol Team approved ZIKV-cohort study that will continue the longitudinal follow-up of children born with documented confirmed or presumptive in-utero ZIKV exposure ("ZIKV-exposed" cohort) and children born without documented confirmed or presumptive in-utero ZIKV exposure, matched by site and birth sex ("ZIKV-unexposed" cohort). Follow-up evaluations and assessments will allow for the determination and comparison of long-term neurodevelopmental outcomes among in utero ZIKV-exposed and ZIKV-unexposed children. Each participant will be followed for about 2 years, beginning at approximately 18 months through 42 months of age.

Epidemiological study about eye discomfort complaints, comorbidities and diagnosis at a Brazil's ophthalmological public care service

This project aims to analyse eye movements, their alterations and influence in reading performance in patients with acquired CNS diseases and compare them with people of the same age, without neurological or ocular pathology and with normal reading speed and pattern. The exploration is focused on the oculomotor system in patients with CNS diseases, even without involvement of the primary visual pathway, and reveals more involvement than the one obtained by a simple ophthalmological examination.

Primary objective: assessment of the prevalence of AHI1 mutations in Joubert syndrome and cerebello-oculo-renal syndromes (JS/CORS) Secondary objective: assessment of the prevalence of CEP290 mutations and NPHP1 homozygous deletions in JS/CORS caracterization of mutational spectrum of AHI1, NPHP1, CEP290 genes in JS/CORS. evaluation of genotype-phenotype correlation in JS/CORS.

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.

Visual impairment can affect up to 70% of stroke survivors, but many do not have their vision adequately assessed in hospital. An unidentified visual defect can cause significant problems for recovery and quality of life. The Stroke Vision app (an application currently scaled for a 10" Android tablet) has been developed to act as a screening tool for visual problems in stroke survivors; to help identify visual problems earlier and thereby improve rehabilitation outcomes. The app includes a suite of tests for assessing the patient's acuity, their visual fields and to aid in the identification of visual neglect / inattention. Furthermore, it includes educational information on visual stroke in order to better educate staff, patients and their carers. This study seeks to validate the novel digital assessments included in the Stroke Vision app against the current methods used for screening (clinical examination by confrontation field testing). Both screening measures will be compared with the gold standard methods for visual assessments, Octopus perimetry for fields and paper-based methods for visuospatial neglect