Active clinical trials for "Dry Eye Syndromes"

To evaluate safety with the use of Systane Ultra in contact lens wearers. A comparison to a currently marketed contact lens rewetting drop will be included as a control.

The objective of this retrospective chart review is to evaluate the patient characteristics, treatment variations and efficacy of a second trial of Cyclosporine Ophthalmic Emulsion 0.05% therapy in chronic dry eye patients who were initially treated with Cyclosporine Ophthalmic Emulsion 0.05% but discontinued use after less than 12 weeks of treatment.

The purpose of the research is to determine if putting fluorescein onto the eye (most common test done for dry eye syndrome) is an accurate way to measure dry eye symptoms. The investigators can avoid placing any foreign substance into the eye by using a manual keratometer. Therefore, the investigators want to compare the measurements of tear breakup time using fluorescein with using a novel method, a manual keratometer and then compare these measurements to a validated dry eye symptoms questionnaire. All qualifying patients who were scheduled in the Jones Eye Institute Clinics for a complete eye exam were offered information about the study and invited to participate. Participants were recruited from February 29, 2009 to April 14, 2009.Participants who did not meet the study protocol's inclusion and exclusion criteria were not included the study or study data analysis. All subjects eyes were measured for KTBUT and FTBUT.

This is a multi-center, prospective, controlled, observational study of the natural history of patients with dry eye disease.

2017 International Dry Eye Workshop (DEWS) defines dry eye as a multifactorial ocular surface disease characterized by tear film instability with disturbed visual function. As a smooth transparent structure and the outmost layer of the whole ocular refractive system, tear film plays an important role. In dry eye, the instability of tear film caused by a lack of tear volume or high evaporation makes it more vulnerable to break up during blinking intervals, exposing the rough epithelium of the corneal surface and introducing extra aberrations and scatter. This would affect image sharpness on the retina and lower the optical quality. Also, it had been observed that the dynamic tear film scattering was reduced and the objective optical quality was improved transiently after artificial tears instillation. Though these findings supported the fact of visual quality impairment in dry eye. It remains unclear how does the tear film instability affect the visual quality in specific. Whether it lowers the optical quality of the whole ocular or just affects the tear-film associated part alone and whether there is a correlation with the tear film function are still unknown and to be answered. So we wondered whether there is a correlation between the tear film function and the related optical quality in dry eye. Though it had been inspected that the invasive tear break up time by fluorescein staining was positively correlated with the related scattering of tear film. To the newest dry eye diagnosis criteria of 2017 DEWS, the non-invasive tear break-up time has been amended to the first line instead of the invasive methods, e.g. fluorescein staining, which was thought to be less accurate and less credible. What's more, the invasive method of tear film evaluation might introduce confounding factors to the successive optical quality assessment. So we need a more accurate investigation to the relationships of the tear film function and the optical quality in dry eye. This study was intended to measure the non-invasive tear break-up time and the objective optical quality in normal people and dry eye patients to illustrate this question. In addition, we will investigate the relation of evolution trends of NIKBUT and objective optical quality under artificial tears for a better illustration.

This observational pilot-study is intended to collect outcome data from a cohort of 30 patients suffering from hyper-evaporative dry eye disease who are treated with the medical device NovaTears® eye drops for a duration of 5 to 7 weeks.

The ocular surface is the first line of defence of the eye, it is therefore where external threats are sensed, and potential insults neutralised. Over the course of evolution, various microbes, especially bacteriae, have come to colonise the ocular surface as commensals. The commensals have a role to maintain the homeostasis of the ocular surface. 1 The innate immunity of the ocular surface is very active, and consists of active mechanisms to suppress inflammation 2. For example, there exist macrophages, dendritic cells, suppressor cells, regulatory cells, B cells, IgA, lysozyme, anti-microbial peptides and barriers against external agents. The normal commensals of the ocular surface maintain a basal level of activation of innate defence by stimulating the pattern recognition receptors on ocular surface epithelial cells. This normal composition of microbes is important since inflammation and infection will result if there is introduction of a pathogenic strain that overcomes the flora, or if a dominant strain secretes excessively immunogenic products, such as the exotoxin A of Staphylococcus which triggers marginal keratitis, a form of type IV hypersensitivity. The flora load of microbiome could also influence tear function as a higher flora load was found to be associated with increased mucin degradation 3 and reduced globet cell densitiy 4. Previous studies [I'm not sure which studies these are] at SERI/SNEC also point to the importance of microbes. For example, in dry eye patients, there is increased lysophospholipids in the tear, and this may contribute to inflammatory mediators such as arachidonic acid and other metabolites. The lysophospholipids are formed by phospholipase A2 reactions, and the latter may be microbial in origin. Since dry eye is a known inflammatory disease of the ocular surface, this is one way that microbes can contribute to the pathology.

This is a comparative, open label, parallel group, non interventional study to further demonstrate the efficacy and tolerability of BAT04. In addition the efficacy and safety shall be compared to Hyaluronic acid (HA)-Product. The patient applies BAT04 or HA-Product according to the instructions for use six times daily in both eyes over a period of 28 days. Response to treatment is recorded at day 28.

This study will evaluate the prevalence of inflammatory dry eye disease in patients prior to cataract surgery. No treatment is administered in this study.

Dry eyes are a very common complaint. In some patients, we can identify the reason for the dryness; however, in others the dryness has no clear cause. Dryness can lead to eye irritation, redness, and sometimes changes in vision. Fibromyalgia is a condition of chronic pain that is poorly understood but seems to have a component of altered sensory processing. People with fibromyalgia tend to complain of dry and irritated eyes at a higher rate than the general population. We plan to evaluate patients with dry eye symptoms for abnormalities in sensory processing and in their autonomic nervous system. We hope to learn about possible relationships between dry eye symptoms and fibromyalgia in order to better understand and treat these conditions.