[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100054067":3},{"organization":4,"armGroups":7,"interventions":16,"overallOfficials":35,"centralContacts":42,"locations":52,"responsibleParty":67,"collaborators":69,"id":72,"slug":73,"hasResults":74,"nctId":75,"briefTitle":76,"officialTitle":76,"acronym":77,"eligibilityCriteria":78,"healthyVolunteers":79,"sex":80,"minAge":81,"maxAge":82,"enrollmentInfo":83,"targetDuration":10,"studyType":86,"phases":10,"briefSummary":87,"conditions":88,"keywords":90,"overallStatus":94,"whyStopped":10,"lastUpdateSubmitDate":95,"lastUpdatePostDateStruct":96,"startDateStruct":99,"completionDateStruct":101,"leadSponsor":103,"locationsCount":104},{"fullName":5,"class":6},"Assistance Publique - Hôpitaux de Paris","OTHER",[8],{"label":9,"type":10,"description":11,"interventionNames":12},"Healthy individual",null,"Individuals with no visual or oculomotor disorders.",[13,14,15],"Other: Fusional Vergence assessment","Other: Ocular dominance evaluation","Other: Complete Orthoptic",[17,23,29],{"type":6,"name":18,"description":19,"armGroupLabels":20,"otherNames":21},"Fusional Vergence assessment","Measurement of sensorimotor fusional vergence in the right and left eyes, in divergence and convergence, first for distance vision and then for near vision. A random draw will determine which eye is tested first for distance vision, followed by a second draw for near vision, in order to minimize training bias. Prior to this, a stereoscopic acuity test will be performed to confirm the presence of binocular vision.",[9],[22],"Measurements of sensorimotor fusion",{"type":6,"name":24,"description":25,"armGroupLabels":26,"otherNames":27},"Ocular dominance evaluation","Assessment of ocular dominance for:\n\n* The dominant eye using the monocular blurriness test and the red-glass test\n* The leading eye using the Mawas plate Punctum Proximum convergence test and the bilateral prismatic test for oculomotor dominance\n* The preferred eye using the spontaneous ocular method\n* The target eye using the Hole-in-Card method: hole-in-card test",[9],[28],"Assessment of ocular dominance",{"type":6,"name":30,"description":31,"armGroupLabels":32,"otherNames":33},"Complete Orthoptic","Conducting an orthoptic evaluation to verify that patients meet the study's inclusion criteria:\n\n* assessment of visual acuity and refraction\n* assessment of stereoscopic vision\n* cover-test to screen potential abnormal phorias\n* measurement of interpupillary distance",[9],[34],"Orthoptic evaluation",[36,39],{"name":37,"affiliation":5,"role":38},"Maxence Rateaux, PhD","PRINCIPAL_INVESTIGATOR",{"name":40,"affiliation":5,"role":41},"Dominique MD, PhD BREMOND-GIGNAC","STUDY_DIRECTOR",[43,48],{"name":37,"role":44,"phone":45,"phoneExt":46,"email":47},"CONTACT","01 44 49 53 62","+33","maxence.rateaux@aphp.fr",{"name":49,"role":44,"phone":50,"phoneExt":46,"email":51},"Hélène Morel","01 44 38 16 53","helene.morel@aphp.fr",[53],{"facility":54,"status":10,"city":55,"state":10,"zip":56,"country":57,"countryCode":58,"cosmosGeoPoint":59,"geoPoint":64,"contacts":65},"Hôpital Necker-Enfants Malades","Paris","75015","France","FR",{"type":60,"coordinates":61},"Point",[62,63],2.3488,48.85341,{"lat":63,"lon":62},[66],{"name":37,"role":44,"phone":45,"phoneExt":46,"email":47},{"type":68,"investigatorFullName":10,"investigatorTitle":10,"investigatorAffiliation":10,"oldNameTitle":10,"oldOrganization":10},"SPONSOR",[70],{"name":71,"class":6},"URC-CIC Paris Descartes Necker Cochin","100054067","a-comparative-study-of-fusional-vergence-according-to-ocular-dominance-in-healthy-subjects-100054067",false,"NCT07697131","A Comparative Study of Fusional Vergence According to Ocular Dominance in Healthy Subjects","ECAFOSS","Inclusion Criteria:\n\n* Adults between the ages of 18 and 35 with no known eye conditions, with or without ametropia. If ametropia is present: it must be corrected\n* Subjects with no history of eye surgery, including refractive surgery\n* Subjects who have been informed about the study and have freely and knowingly consented to participate in the study and to the collection of data\n\nExclusion Criteria:\n\n* Subjects with strabismus\n* Subjects with visual acuity of less than 20\u002F20; or anisometropia",true,"ALL","18 Years","35 Years",{"count":84,"type":85},60,"ESTIMATED","OBSERVATIONAL","In orthoptics, fusional vergence (FV) measurement is one of the key tests used to assess fusion ability. These amplitudes are generally reduced in individuals with convergence insufficiency. Fusional vergence are quantified by placing a prism bar randomly in front of one eye-first for distance vision and then for near vision. Rehabilitation exercises using the prism bar are also performed in the same manner.\n\nDepending on orthoptic practice, the prism bar is placed in front of the left eye or the right eye, in a dogmatic manner, or in front of the right eye, in a conventional manner, without any study providing any justification. However, some practitioners report interocular differences when measuring fusion amplitudes depending on which eye is prismed, while others do not.\n\nThe hypothesis put forward is that, in individuals with an interocular difference in fusional vergence, ocular dominance (sensory and motor) could be the cause of this measurement discrepancy.\n\nThe objective is therefore to compare the difference in fusional vergence depending on whether the dominant or non-dominant eye is tested, using a randomized order of eyes and tests.\n\nIf this hypothesis is confirmed (greater fusional vergence when tested on the dominant eye), this would: (1) enhance our understanding of fusion mechanisms, (2) provide more targeted insights for the assessment, quantification, and rehabilitation of fusional vergence to improve the effectiveness of orthoptic intervention.",[89],"No Eye Disorder",[91,92,93],"Fusional vergence","Ocular dominance","Orthoptic practice","NOT_YET_RECRUITING","2026-07-06",{"date":97,"type":98},"2026-07-13","ACTUAL",{"date":100,"type":85},"2026-09",{"date":102,"type":85},"2027-07",{"name":5,"class":6},1]