[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100659953":3},{"organization":4,"outcomesModule":7,"designInfo":19,"detailedDescription":18,"studyPopulation":18,"armGroups":29,"interventions":46,"overallOfficials":59,"centralContacts":64,"locations":69,"responsibleParty":83,"collaborators":18,"id":86,"slug":87,"hasResults":88,"nctId":89,"briefTitle":90,"officialTitle":91,"acronym":92,"eligibilityCriteria":93,"healthyVolunteers":88,"sex":94,"minAge":95,"maxAge":96,"enrollmentInfo":97,"targetDuration":18,"studyType":100,"phases":101,"briefSummary":103,"conditions":104,"keywords":106,"overallStatus":71,"whyStopped":18,"lastUpdateSubmitDate":110,"lastUpdatePostDateStruct":111,"startDateStruct":114,"completionDateStruct":116,"leadSponsor":118,"locationsCount":119},{"fullName":5,"class":6},"University of Seville","OTHER",{"primaryOutcomes":8,"secondaryOutcomes":13,"otherOutcomes":18},[9],{"measure":10,"description":11,"timeFrame":12},"Visual field volume","It will consist of the volume defined by two parallel surfaces bounded by the visual fields perceived with clear horizontal and vertical vision by the patient between the distances of 4 m and 25 cm while wearing each pair of spectacles. The volume will be calculated using the Heronian formula for the volume of a quadrangular pyramidal frustum.","Immediately after the adjustment of the frame where the lenses were placed, an average of 30 minutes per patient.",[14],{"measure":15,"description":16,"timeFrame":17},"Visual fields surface","Calculation of the visual field surface areas defined by the patient with each lens type at distances of 4 m, 2 m, 1.33 m, 80 cm, 40 cm, and 25 cm. For this purpose, the areas corresponding to the visual field regions of the lens located between the fitting cross and the intermediate and near viewing zones were summed in a 1:2 proportion, respectively, for each measured distance.","Immediately after the adjustment of the frame where the lenses were placed, an average of 30 minutes per patient",null,{"allocation":20,"interventionModel":21,"interventionModelDescription":18,"primaryPurpose":22,"observationalModel":18,"timePerspective":18,"maskingInfo":23},"RANDOMIZED","CROSSOVER","TREATMENT",{"masking":24,"maskingDescription":25,"whoMasked":26},"DOUBLE","A code was assigned to each participant and each type of lenses. Investigators don't know which lens are being assessed during the trial.",[27,28],"PARTICIPANT","INVESTIGATOR",[30,36,41],{"label":31,"type":32,"description":33,"interventionNames":34},"OPL designed for PC use and 133cm of visual depth field","EXPERIMENTAL","Occupational progressive lenses designed to provide clear vision from 133 cm to 40 cm, with a wider visual field optimized for monitor-based environments with a depth of field between 60 and 80 cm. These lenses, designated L1, were custom ordered with neutral distance power and a near addition of +2.00 D, a vertex distance of 13 mm, pantoscopic tilt of 8°, wrap angle of 6°, working distance of 40 cm, inset of 2.5 mm in both eyes, and NPD of 31 mm in each eye",[35],"Device: OPAL PC 133 assessment",{"label":37,"type":32,"description":38,"interventionNames":39},"OPL designed for PC use and 200cm of visual depth field","Occupational progressive lenses designed to provide clear vision from 200 cm to 40 cm, with a wider visual field optimized for monitor-based environments with a depth of field between 60 and 80 cm. These lenses, designated L1, were custom ordered with neutral distance power and a near addition of +2.00 D, a vertex distance of 13 mm, pantoscopic tilt of 8°, wrap angle of 6°, working distance of 40 cm, inset of 2.5 mm in both eyes, and NPD of 31 mm in each eye",[40],"Device: OPAL PC 200 assessment",{"label":42,"type":32,"description":43,"interventionNames":44},"PAL","Progressive additional lenses custom ordered with neutral distance power and a near addition of +2.00 D, vertex dis-tance of 13 mm, pantoscopic tilt of 8°, wrap angle of 6°, working distance of 40 cm, inset of 2.5 mm in both eyes, and NPD of 31 mm in both eyes.",[45],"Device: PAL assessment",[47,52,56],{"type":48,"name":49,"description":50,"armGroupLabels":51,"otherNames":18},"DEVICE","OPAL PC 133 assessment","Fitting and positioning of the spectacles : participants were instructed to move only their eyes and to verbally identify the letters indicated by the optometrist. Measurement of clear vision limits: the horizontal and vertical boundaries of clear vision were recorded on a scaled results sheet, as defined by the participant using the optotype, at distances of 400, 200, 133, 80, 40, and 25 cm, in that order.",[31],{"type":48,"name":53,"description":54,"armGroupLabels":55,"otherNames":18},"OPAL PC 200 assessment","Fitting and positioning of the spectacles : participants were instructed to move only their eyes and to verbally identify the letters indicated by the optometrist. Measurement of clear vision limits: the horizontal and vertical boundaries of clear vision were recorded on a scaled results sheet, as defined by the participant using the optotype, at distances of 400, 200, 133, 80, 40, and 25 cm, in that order",[37],{"type":48,"name":57,"description":54,"armGroupLabels":58,"otherNames":18},"PAL assessment",[42],[60],{"name":61,"affiliation":62,"role":63},"José Manuel Serrano Morales, PhD","Pharmacy School, University of Seville","PRINCIPAL_INVESTIGATOR",[65],{"name":61,"role":66,"phone":67,"phoneExt":18,"email":68},"CONTACT","0034654686850","jsmorales@us.es",[70],{"facility":62,"status":71,"city":72,"state":73,"zip":74,"country":75,"countryCode":76,"cosmosGeoPoint":77,"geoPoint":82,"contacts":18},"RECRUITING","Seville","Andalusia","41012","Spain","ES",{"type":78,"coordinates":79},"Point",[80,81],-5.97317,37.38283,{"lat":81,"lon":80},{"type":63,"investigatorFullName":84,"investigatorTitle":85,"investigatorAffiliation":5,"oldNameTitle":18,"oldOrganization":18},"José Manuel Serrano Morales","Optometry Degree, Pharmacy Degree, PhD in Molecular Biology, Biomedicine and Clinical Research","100659953","volumetric-visual-fields-at-different-distances-in-presbyopic-patients-using-occupational-pc-133-and-pc-200-and-general-purpose-progressive-addition-lenses-100659953",false,"NCT07870785","Volumetric Visual Fields at Different Distances in Presbyopic Patients Using Occupational (PC-133 and PC-200) and General-Purpose Progressive Addition Lenses","Ensayo clínico, unicéntrico, Transversal, Randomizado, Cruzado, Doble Ciego Para Evaluar Las Diferencias de Los Campos volumétricos de visión en Pacientes présbitas, Entre 400 y 40 cm., de Tres Tipos de Lentes oftálmicas Neutras de Lejos y adición Progresiva de 2 D. Dos de visión Intermedia y Cerca OPL (PC-133 y PC-200), y Otra Generalista PAL de visión Lejos, Intermedia y Cerca (FIT-FRM).","CIVIUS2026PAL","Inclusion Criteria:\n\n* • Spherical ametropia for distance vision ≤ ±4.00 D and astigmatic ametropia ≤ 1.00 D.\n\n  * Decimal VA ≥ 0.8, either uncorrected (UCVA) or corrected (BCVA) with monofocal contact lenses.\n  * Patients with a nasopupillary distance (NPD) of 31 mm, with a tolerance of ±2 mm in each eye\n\nExclusion Criteria:\n\n* Astigmatism greater than ±1.00 D.\n* Patients wearing progressive contact lenses.\n* Patients who have undergone cataract surgery or have monofocal or multifocal intraocular lenses.\n* Anisometropia greater than 2.50 D.\n* Decimal distance visual acuity \\\u003C 0.8 (UCVA or BCVA) with monofocal contact lenses.","ALL","52 Years","67 Years",{"count":98,"type":99},28,"ESTIMATED","INTERVENTIONAL",[102],"NA","This single-center, randomized, double-blind, crossover clinical trial aims to compare the volumetric visual fields provided by two occupational progressive addition lenses (OPLs) optimized for intermediate and near vision in presbyopic patients. The study evaluates Vimax PC 1.5 FWD 133 cm and Vimax PC 1.5 FWD 200 cm lenses and Vimax Fit FRM, all of them with plano distance power and a +2.00 D near addition, in order to determine differences in the extent of clear vision at multiple working distances.\n\nParticipants will undergo a comprehensive optometric examination including medical and ocular history, visual acuity assessment, accommodative amplitude measurement, autorefraction, interpupillary distance measurement, ocular motility evaluation, confrontation visual fields, Amsler grid testing, and binocular vision assessment. Visual field measurements will then be performed using both study lenses under standardized conditions. Subjects will be instructed to maintain a fixed head position while identifying optotypes located at distances of 4 m, 2 m, 1.33 m, 80 cm, 40 cm, and 25 cm. Both lenses will be tested in random order under masked conditions so that neither participants nor investigators know which lens design is being evaluated during each phase.\n\nAt least 23 presbyopic participants are expected to be enrolled. The study procedures are non-invasive and are anticipated to be completed in a single one-hour visit, although additional sessions may be scheduled if necessary. No significant risks are expected beyond possible transient visual fatigue associated with the duration of testing.\n\nThe primary objective is to determine which occupational progressive lens design provides a greater spatial volume of clear vision and wider horizontal and vertical visual fields at different intermediate and near distances. The findings may contribute to improving personalized recommendations of occupational lenses according to patients' visual demands and working distances.",[105],"Presbyopia",[107,105,108,10,109],"Occupational progressive lenses","Visual field depth","Visual acuity","2026-10-06",{"date":112,"type":113},"2026-10-13","ACTUAL",{"date":115,"type":113},"2026-06-08",{"date":117,"type":99},"2027-06-30",{"name":5,"class":6},1]