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Dry eye syndrome: comprehensive etiologies and recent clinical trials.

ABSTRACT: Dry eye syndrome (DES) is multifactorial and likely to be a cause of concern more so than ever given the rapid pace of modernization, which is directly associated with many of the extrinsic causative factors. Additionally, recent studies have also postulated novel etiologies that may provide the basis for alternative treatment methods clinically. Such insights are especially important given that current approaches to tackle DES remains suboptimal. This review will primarily cover a comprehensive list of causes that lead to DES, summarize all the upcoming and ongoing clinical trials that focuses on treating this disease as well as discuss future potential treatments that can improve inclusivity.

SUBMITTER: Huang R

PROVIDER: S-EPMC9178318 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Dry eye syndrome: comprehensive etiologies and recent clinical trials.

Huang Ruojing R Su Caiying C Fang Lvjie L Lu Jiaqi J Chen Jiansu J Ding Yong Y

International ophthalmology 20220609 10

Dry eye syndrome (DES) is multifactorial and likely to be a cause of concern more so than ever given the rapid pace of modernization, which is directly associated with many of the extrinsic causative factors. Additionally, recent studies have also postulated novel etiologies that may provide the basis for alternative treatment methods clinically. Such insights are especially important given that current approaches to tackle DES remains suboptimal. This review will primarily cover a comprehensive ...[more]

PMID: 35678897

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Project description:BackgroundDry eye syndrome is a disorder of the tear film and is associated with symptoms of ocular discomfort. Punctal occlusion is a mechanical treatment in which the tear drainage system is blocked in order to aid in the preservation of natural tears on the ocular surface.ObjectivesThe objective of this review was to assess the safety and efficacy of punctal plugs for the management of dry eye.Search strategyWe searched the Cochrane Central Register of Controlled Trials (CENTRAL) (which contains the Cochrane Eyes and Vision Group Trials Register) (The Cochrane Library 2010, Issue 6), MEDLINE (January 1950 to June 2010), EMBASE (January 1980 to June 2010), Latin American and Caribbean Literature on Health Sciences (LILACS) (January 1982 to June 2010), the metaRegister of Controlled Trials (mRCT) (www.controlled-trials.com) and ClinicalTrials.gov (http://clinicaltrials.gov). We also searched the Science Citation Index-Expanded database and reference lists of included studies. There were no language or date restrictions in the search for trials. The electronic databases were last searched on 21 June 2010.Selection criteriaWe included randomized and quasi-randomized controlled trials of collagen or silicone punctal plugs in symptomatic participants diagnosed with aqueous tear deficiency or dry eye syndrome.Data collection and analysisTwo review authors independently assessed trial quality and extracted data. We contacted study investigators for additional information.Main resultsSeven randomized controlled trials including 305 participants (601 eyes) met the inclusion criteria and are summarized in this review. We did not perform meta-analysis due to appreciable variability in interventions and follow-up intervals. Although punctal plugs provided symptomatic improvement and clinical outcomes also improved from baseline measures, few studies demonstrated a benefit of punctal plugs over the comparison intervention. Reported adverse effects included epiphora (overflow of tears), foreign body sensation, eye irritation, and spontaneous plug loss.Authors' conclusionsThis systematic review shows a relative scarcity of controlled clinical trials assessing the efficacy of punctal occlusion therapy in dry eye. Although the evidence is very limited, the data suggest that silicone plugs can provide symptomatic relief in severe dry eye. Moreover, temporary collagen plugs appear similarly effective to silicone plugs on a short-term basis.

Project description:IntroductionClinically, thyroid-associated ophthalmopathy (TAO) patients were suffered from dry eye syndrome. Only a few relevant studies were about this topic. Our study was determined to provide high-level evidence for the treatment of TAO with dry eye syndrome.PurposeTo compare the clinical effects of vitamin A palmitate eye gel and sodium hyaluronate eye drop forTAO patients with dry eye syndrome.MethodsThe study was conducted in the Ophthalmology Department of the Ninth People's Hospital Affiliated with the Medical College of Shanghai Jiao Tong University from May to October 2020. A total of 80 mild or moderate-to-severe TAO patients with dry eye syndrome were randomly divided into two groups. The disease stages of all subjects were inactive. Patients in group A were treated with vitamin A palmitate eye gel three times/day for one month and sodium hyaluronate eye drop in group B. The index including break-up time (BUT) and Schirmer I test (ST), corneal fluorescence staining (FL), ocular surface disease index (OSDI), and adverse reactions were recorded by the same clinician at baseline and 1 month after treatment. The data were analyzed by SPSS 24.0.ResultsFinally, 65 subjects completed the treatment. The average age of the patients in Group A was 38.1 ± 11.4 years, and that in Group B was 37.26 ± 10.67 years. 82% of the subjects in group A were female and 74% in group B. There was no significant difference between the two groups at baseline, including the value of ST, BUT, OSDI, and FL grade. After the treatment, the effective rate was 91.2% in group A, of which the value of BUT and FL grade was significantly improved (P < 0.001). The effective rate in group B was 67.7%, of which the value of OSDI score and FL grade was significantly improved (P = 0.002). In addition, the BUT value of group A was significantly longer than that of group B (P = 0.009).ConclusionInTAO patients with dry eye syndrome, vitamin A palmitate gel and sodium hyaluronate eye drop improved the dry eye and promoted corneal epithelial repair. Vitamin A palmitate gel improves the stability of tear film, while sodium hyaluronate eye drop improves patients' subjective discomfort.

Project description:BackgroundDry eye disease (DED), Meibomian gland dysfunction (MGD), and Sjögren's syndrome dry eye disease (SS-DED) are eye dryness conditions that show significant overlap in various symptoms of ocular discomfort. The aim of this study was to qualitatively explore the patient experience and evaluate content validity of the newly developed Dry Eye Disease Questionnaire (DED-Q).MethodsSemi-structured interviews were conducted with 61 US adults who reported experiencing ocular symptoms due to their physician-confirmed primary diagnosis of DED (n = 21), MGD (n = 20), or SS-DED (n = 20). The open-ended concept-elicitation phase was followed by cognitive debriefing (CD) of the DED-Q to evaluate participants' understanding and relevance of the instructions, items, response options, and recall periods. Interviews were also conducted with eight specialist healthcare professionals to assess clinical relevance of the concepts included. Verbatim interview transcripts were analyzed using thematic analysis in ATLAS.ti v8 software.ResultsA total of 29 symptoms and 14 impacts on quality of life were reported across participant interviews. Primary ocular symptoms reported included eye dryness (n = 61/61; 100%), eye irritation (n = 55/61; 90%), eye itch (n = 54/61; 89%), burning sensation (n = 52/61; 85%), and foreign body sensation (n = 51/61; 84%). The most impacted aspects of daily life were using digital screens (n = 46/61; 75%), driving (n = 45/61; 74%), working (n = 39/61; 64%), and reading (n = 37/61; 61%). CD findings showed most participants had good understanding of DED-Q items and confirmed most concepts were relevant to the lived experience of their condition. Aside from few minor changes to the items and examples to facilitate more accurate interpretation, the proposed instruction wording was modified for various symptom and impact modules to encourage participants to focus only on dry eye vision problems.ConclusionsThis research identified multiple prevalent symptoms and impacts of DED, MGD, and SS-DED, most of which were similar across the conditions. The DED-Q was confirmed to be a content-valid PRO measure suitable for use in clinical studies to assess the patient experience of DED, MGD, and SS-DED. Future work will focus on evaluating the psychometric properties of the DED-Q for use as an efficacy endpoint in clinical trials.

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Dry eye syndrome: comprehensive etiologies and recent clinical trials.

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Dry eye syndrome: comprehensive etiologies and recent clinical trials.

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