View clinical trials related to Dry Eyes.
Filter by:This is a clinical trial where 44 subjects dry eyes were instilled with Virgin Coconut Oil (VCO CL) using contact lenses as its vehicle. All subjects are healthy subjects with no other ocular diseases except for having some dry eye symptoms (included with McMonnies questionnaires). Parameters measured at baseline and after 15 minutes of insertion and were compared. The control eyes were inserted with contact lenses soaked in saline (CCL). The eye that wears the VCO CL or the CCL were chosen randomly by masked operator. At the end of this study, the parameters measured will indicate if the VCO CL was able to retain tears in the eye and remove the dry eyes symptoms.
The investigators seek to characterize the identity of all microorganisms residing on the eye's surface (conjunctiva) in healthy eyes and those with dry eye syndrome, using a combination of analyses. Dry eye disease is thought to have an inflammatory basis and in the vast majority of cases the cause of the chronic inflammatory condition is unknown.
To investigate if fresh finger prick autologous blood (FAB) instead of serum from venesection, is a safe and effective treatment for dry eyes and corneal ulcers/ epithelial defects. Currently there are no studies on the use of whole fresh blood for the treatment of chronic ulcers, persistent epithelial defects or dry eyes. Unpublished case reports indicate that fresh blood can be an effective tool to the treatment of corneal pathology.
Sjögren's syndrome (SjS) is an autoimmune disease characterized primarily by exocrine gland dysfunction, specifically of the salivary and lacrimal glands, resulting in dry mouth and dry eyes symptoms. It can be systemic by affecting other organs including the gastrointestinal tract, skin, lungs, vasculature, kidneys, bladder and vagina. Involvement of the musculature can lead to fibromyalgia-like symptoms and chronic fatigue, while approximately 20% of patients develop various neuropathies, including sensory, peripheral, cranial and myelopathic neuropathies exhibited by cognitive impairments such as dementia, lack of concentration, memory loss and various psychiatric disorders. Like most autoimmune connective tissue diseases, SjS shows a sexual dimorphism with women affected 10-times more frequently than men, suggesting a role for sex hormones in disease susceptibility or progression. One common feature of SjS is it infiltration of mononuclear cells into the salivary and lacrimal glands, aggregating into clusters referred to as lymphocytic foci (LF). Critical to the studies proposed is the fact that a predominant cell population of LF is the pathogenic TH17 cell that produces IL-17 cytokine and autoreactive B cells reactive to M3R, Ro, and La autoantigens. The goal of this study is characterize the change in receptor gene repertoires of autoreactive B and T cells at different time points during the disease process and examine the correlation with various disease parameters.
Non-contact meibography is a useful tool in assessing the health of meibomian glands in patients. Instead of using normal light in contact meibography, non-contact meibography utilises infra-red (IR) light. IR light is shined on patients' inverted eyelids and a special camera then allows visualisation of the structure of the meibomian glands, including the ducts and acini. Currently, images taken via non-contact meibography are manually analysed by a skilled clinician. Knowledge of the health of meibomian glands is useful, especially in the diagnosis of Meibomian Gland Dysfunction (MGD). Studies have shown that MGD is one of the most common causes of evaporative dry eye. Mediview 2.0 is a software that has been programmed to semi-automatically classify meibograph images taken via non-contact meibography. This software is collaboration with Shanghai MediWorks Precision Instruments Co., Ltd. The algorithm used was developed by a collaboration between Agency for Science, Technology and Research (A*STAR) and Singapore Eye Research Institute (SERI). This current study aims to validate the diagnostic accuracy of Mediview 2.0 in assessing the health of meibomian glands of patients, against a trained clinician. We aim to recruit 100 participants for this study. Once this software is found to be valid, a trained technician could be taught how to capture the images and hence leaving the doctors with more time to focus on clinical assessment and treatment instead. Therefore, this study has the potential to increase efficiency in the clinics.
Dry eye syndrome is a very common condition with multiple etiologies that includes systemic and ocular disease that causes reduction in the production of tears, as well as increase in tears evaporation. As a result of the various etiologies and large variability of dry eye's clinical sign, it has been a challenge for practitioners to have a consistent system to classify dry eyes and to have an appropriate and accurate measurement to quantify the severity of dry eyes and its impact on patients' quality of life.6 To date, no study which evaluates the extent of questionnaires correlates with changes in quality of life. With this cross sectional interview study, we aim to determine the efficacy of the questionnaires as a practical tool in our future clinical trials at our center.
Conjunctivochalasis refers to loose redundant, non-edematous inferior conjunctiva that is situated between the globe and lower eyelid, and usually it occurs bilaterally. It has been reported to cause ocular discomfort, tear instability, alteration of tear spreading and subsequently dry eye, which is a common condition that affects vision and quality of life in patients. This condition has also been reported to be associated with aging and ocular surface inflammation. The assessment of conjunctivochalasis was traditionally based on silt lamp examination and this may be cumbersome and highly subjective. Only recently, researchers have advocated the use of imaging and more objective documentation by anterior segment optical coherence tomography (AS-OCT), using Fourier-Domain RTVue-100 OCT. The AS-OCT is an imaging method that documents the tear meniscus and prolapse of conjunctiva into the tear meniscus in a safe, rapid and non-invasive way. Image analysis on the area of prolapsed conjunctiva can then be used to ascertain the severity of conjunctivochalasis. We propose the use of HD-Cirrus AS-OCT for the imaging of conjunctivochalasis, since this technique provides more magnified and colored digital images, which helps to delineate different tissues and serves as a better education tool for patients. This current study aims to investigative the inter and intra examiner reproducibility of imaging conjunctivochalasis using HD-Cirrus AS-OCT, using patients from the dry eye clinic from the Singapore National Eye Centre. These patients will be asked to come to the centre for imaging and have three scans of the same eye performed in one session by two trained investigators consecutively. The resulting limits of repeatability will be very useful for us to follow up patients who undergo surgical or diathermy treatment for conjunctivochalasis, and for sample size calculation in the planning of interventional studies.
Dry eye clinical research is limited to follow up of disease progression. While a large catalogue of tests, such as corneal staining grading, tear break up time (TBUT) and Schirmer's test, is available, objective assessments demonstrate poor to moderate repeatability. Among these assessments, TBUT has the best repeatability while the Schirmer's test shows good repeatability for more severe forms of the disease.1 As such, currently, most research outcomes are based on subjective patient complaints rather than objective assessment of the condition. LipiView Ocular Surface Interferometer (LipiView) is a HSA-approved imaging device that has the ability to assess optical interference pattern produced by light reflected off the tear film in a safe and non-invasive manner.2 Software analysis of the image then measures the tear LLT, which is used to objectively quantify the diagnosis of lipid-deficient dry eye. This current study aims to investigative the inter and intra-examiner reproducibility of measuring tear lipid layer thickness (LLT) with LipiView, which is used in our current clinical setting. LipiView has not been evaluated on its reproducibility of measuring tear lipid layer thickness. The study will also assess for correlation between the magnitude of tear LLT and the inter and intra-examiner reproducibility of LipiView. Once this method is found to be repeatable, this can be used in future clinical settings and trials as an additional tool to investigate dry eye treatments.
Contact lens induced dry eyes leads to lens intolerance and discontinuation. Incidence of dry eye in contact lens wearer is significantly higher in Asian population compared to other ethnic group considering Asian has lower tear break up time. Disruptions of tear integrity in contact lens wearer will further exacerbate the condition. Factors for successful contact lens fitting derive from the biocompatibility of lens material, lens design and stability of tear film in front of the contact lens. This study aim to investigate the efficacy of a novel daily disposable contact lens with zwitterionic material that contains alginic acid which act as a moisturizing agent. The improved lens material may likely improve the comfort and treat symptomatic wearers.
The purpose of this research is to: 1. Evaluate the safety and efficacy of a steroid eye drop (Lotemax) in patients who have been diagnosed with graft-versus-host disease (GVHD), which is a complication that may occur after bone marrow transplant where the newly transplanted material attacks the patient's body and may cause eye dryness. 2. Assess the safety and efficacy of Lotemax in decreasing the eye's reaction to the process in GVHD before the patient undergoes bone marrow transplant. 3. Compare how well Lotemax works in decreasing the process in GVHD with an immunosuppressive eye drop (Restasis), which has been commonly used in the treatment of this condition.