[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100322226":3},{"organization":4,"outcomesModule":7,"designInfo":14,"detailedDescription":20,"studyPopulation":13,"armGroups":21,"interventions":33,"overallOfficials":39,"centralContacts":43,"locations":53,"responsibleParty":71,"collaborators":13,"id":75,"slug":13,"hasResults":76,"nctId":77,"briefTitle":78,"officialTitle":79,"acronym":13,"eligibilityCriteria":80,"healthyVolunteers":81,"sex":82,"minAge":83,"maxAge":84,"enrollmentInfo":85,"targetDuration":13,"studyType":88,"phases":89,"briefSummary":91,"conditions":92,"keywords":13,"overallStatus":55,"whyStopped":13,"lastUpdateSubmitDate":94,"lastUpdatePostDateStruct":95,"startDateStruct":98,"completionDateStruct":100,"leadSponsor":102,"locationsCount":103},{"fullName":5,"class":6},"University of Iowa","OTHER",{"primaryOutcomes":8,"secondaryOutcomes":13,"otherOutcomes":13},[9],{"measure":10,"description":11,"timeFrame":12},"Assess Validity of the test construct measuring flicker fusion thresholds.","The smartphone app developed is a flicker fusion that presents the subject with a series of stimuli consisting of a flickering pattern of bars above or below a static rectangle. The study will assess the validity of the test construct in measuring flicker fusion thresholds, and serve as a foundation for further iterative designs of the app and future validation and characterization studies.","1\u002F1\u002F2020",null,{"allocation":15,"interventionModel":16,"interventionModelDescription":13,"primaryPurpose":17,"observationalModel":13,"timePerspective":13,"maskingInfo":18},"NON_RANDOMIZED","PARALLEL","SCREENING",{"masking":19,"maskingDescription":13,"whoMasked":13},"NONE","The smartphone app developed is a flicker fusion that presents the subject with a series of stimuli consisting of a flickering pattern of bars above or below a static rectangle. For each stimulus presentation, the user has to tap the region that is flickering. The duration of the app is less than 2 minutes.\n\nThis study will assess the validity of the test construct in measuring flicker fusion thresholds, and serve as a foundation for further iterative designs of the app and future validation and characterization studies.",[22,28],{"label":23,"type":24,"description":25,"interventionNames":26},"eyeFusion Control Subjects","ACTIVE_COMPARATOR","Healthy normal controls with no known eye disorders age 18-80.",[27],"Device: eyeFusion",{"label":29,"type":30,"description":31,"interventionNames":32},"eyeFusion Patients","EXPERIMENTAL","Scotoma subjects aged 18-80.",[27],[34],{"type":35,"name":36,"description":37,"armGroupLabels":38,"otherNames":13},"DEVICE","eyeFusion","Smartphone app based flicker fusion test.",[23,29],[40],{"name":41,"affiliation":5,"role":42},"Randy Kardon, MD, PhD","PRINCIPAL_INVESTIGATOR",[44,49],{"name":45,"role":46,"phone":47,"phoneExt":13,"email":48},"Julie K Nellis, BSN","CONTACT","319-356-2780","julie-nellis@uiowa.edu",{"name":50,"role":46,"phone":51,"phoneExt":13,"email":52},"Jan Full, BSN","319-356-8299","jan-full@uiowa.edu",[54],{"facility":5,"status":55,"city":56,"state":57,"zip":58,"country":59,"countryCode":60,"cosmosGeoPoint":61,"geoPoint":66,"contacts":67},"RECRUITING","Iowa City","Iowa","52240","United States","US",{"type":62,"coordinates":63},"Point",[64,65],-91.53017,41.66113,{"lat":65,"lon":64},[68],{"name":41,"role":46,"phone":69,"phoneExt":13,"email":70},"319-356-2260","randy-kardon@uiowa.edu",{"type":72,"investigatorFullName":73,"investigatorTitle":74,"investigatorAffiliation":5,"oldNameTitle":13,"oldOrganization":13},"SPONSOR_INVESTIGATOR","Randy Kardon","MD, PhD","100322226",false,"NCT03475147","Smartphone Flicker Fusion Test for Patients With Optic Disorders.","Validation of a Smartphone-Based Flicker Fusion Test","Inclusion Criteria:\n\nControl\n\n* Age matched 18-80 years of age.\n* Healthy normal controls with no known eye disorders.\n\nExclusion Criteria:\n\n* Scotoma or any other ocular disorder\n\nInclusion Criteria - Patients\n\n* Age 18-80\n* Clinically associated scotoma\n\nExclusion Criteria - Patients\n\n-Any other ocular disorder",true,"ALL","18 Years","80 Years",{"count":86,"type":87},500,"ESTIMATED","INTERVENTIONAL",[90],"NA","The purpose of this project is to validate a quick, easy-to-use and administer smartphone flicker fusion test. The app (called eyeFusion) can potentially be used to easily and quickly collect critical flicker fusion measurements on patients admitted with optic disorders as part of the clinical care process.",[93],"Scotoma","2025-11-18",{"date":96,"type":97},"2025-11-24","ACTUAL",{"date":99,"type":97},"2017-01-27",{"date":101,"type":87},"2028-01-01",{"name":73,"class":6},1]