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Clinical Trial Details — Status: Enrolling by invitation

Administrative data

NCT number NCT05706220
Other study ID # 22-PI045
Secondary ID
Status Enrolling by invitation
Phase
First received
Last updated
Start date June 13, 2022
Est. completion date December 31, 2023

Study information

Verified date January 2023
Source Instituto Universitario de Oftalmobiología Aplicada (Institute of Applied Ophthalmobiology) - IOBA
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

This project aims to analyze ocular motility problems, visual processing speed and microperimetry, and their relationship with consolidated retinal structural biomarkers (optical coherence tomography, OCT) in patients with Multiple Sclerosis w/w reading complaints comparing with healthy subjects.


Description:

Anamnesis, ophthalmological medical history including difficulties in reading with appropriate glasses. The following protocol will be applied: - Comprehensive eye examination - Stereopsis - Primary gaze position - Cover test: far and near - Vergence and version eye movements - Presence of nystagmus - Far and near best corrected visual acuity, with updated refraction -.Pupillary light reflex - Biomicroscopy of the anterior pole - Intraocular pressure - Recording of eye movements during two standardized tests: International Reading Speed Texts test (IReST®) and Developmental Eye Movement Test (DEM™) with Tobii™ Pro Nano hardware package eye-tracking system and Tobii™ Pro Lab - full edition software. - Visual processing speed - Microperimetry - Optical coherence tomography - Eye fundus - Patients with a history of clinical optic neuritis will additionally undergo contrast sensitivity tests, the Farnsworth® test (Farnsworth test 28 Hue x 100) and normal monocular perimetry using the standard Swedish Interactive Thresholding Algorithm (SITA-central 24-2) perimeter test. Humphrey® (Humphrey visual field analyser) and other tests at the discretion of the investigator.


Recruitment information / eligibility

Status Enrolling by invitation
Enrollment 120
Est. completion date December 31, 2023
Est. primary completion date December 31, 2023
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years to 80 Years
Eligibility Inclusion Criteria: - Diagnosis of Multiple Sclerosis - Best distant corrected visual acuity equal or greater than 0.7 (decimal scale). Glasses or soft contact lenses users. - Best close corrected visual acuity equal to or greater than 20/30 (Snellen scale).Glasses or soft contact lenses users. Exclusion Criteria: - Patients with a history of acute optic neuritis (ON) and/or who experienced an episode of ON <6 months prior to the study, to avoid potential interference of papilledema with accurate peripapillary RNFL thickness measurements. - Patients with other retinal and optic nerve diseases, advanced cataracts according to the international Lens Opacities Classification System III (LOCS III) (opacities greater than C2N2) - Patients with other ophthalmological diseases that could affect central visual acuity - Subjects with high refractive error (+ - 6 diopters). - Subjects with other demyelinating disorders (neuromyelitis optica or acute disseminated encephalomyelitis).

Study Design


Related Conditions & MeSH terms


Intervention

Diagnostic Test:
Eye tracking
Eye tracker will be used to evaluate eye movements
Microperimetry
Perimetric examination with Expert Exam strategy Microperimetry be used for fixation test
Optical coherence tomography (OCT)
Macular Cube 512x128 or 200x200 scan. OCT will be used to analysis of retinal nerve fiber layer, ganglion cell complex and ganglion-cell/inner plexiform layer
Visual processing speed test
Visual processing speed test will be used for assessing subject visual stimulus search and reach times. Thirty-two different everyday visual stimuli divided in four complexity groups that were presented along 8 radial visual field positions at three different eccentricities.

Locations

Country Name City State
Spain IOBA - Universidad de Valladolid Valladolid

Sponsors (3)

Lead Sponsor Collaborator
Instituto Universitario de Oftalmobiología Aplicada (Institute of Applied Ophthalmobiology) - IOBA Fundación Eugenio Rodríguez Pascual, Hospital del Río Hortega

Country where clinical trial is conducted

Spain, 

Outcome

Type Measure Description Time frame Safety issue
Primary Eye Tracking Data Characteristics of eye movements recorded with the eye tracker system during reading tests 24 Hours
Primary Values for Visual Processing Speed (VPS) VPS will be assessing subject visual stimulus search reaction time (S-RT) and reach reaction time (R-RT), measured in seconds. Thirty-two different everyday visual stimuli were divided in four complexity groups that were presented along 8 radial visual field positions at three different eccentricities (10º, 20º y 30º) 24 Hours
Primary Retinal sensitivity assessed by microperimetry Sensitivity and fixation analysis with microperimetry 24 Hours
Primary Values for OCT neuroretinal and peripapillary parameters OCT assessment will be by spectral domain-optical coherence tomography to assess the retinal nerve fiber layer thickness and macular volume in humans 24 Hours
Secondary Fixations recorded with the eye tracker system number of fixations, duration in milliseconds 24 Hours
Secondary Saccades recorded with the eye tracker system number of saccades, duration in milliseconds 24 Hours
Secondary Fixation assessment with microperimetry Fixation assessment: P1, P2 fixation points (indexes P1 and P2) 24 Hours
Secondary Bivariate Contour Ellipse Area (BCEA) analysis with microperimetry BCEA assessment: areas BCEA 63, BCEA 95 24 Hours
Secondary Preferred Retinal Locus (PRL) analysis with microperimetry PRL assessment: Low-PRL, PRL High 24 Hours
Secondary Analysis of the macular integrity (MI) with microperimetry MI assessment: macular integrity index 24 Hours
Secondary Ganglion Cell Layer measurement (GCL: Macular OCT) Optical Coherence Tomography (OCT) will be used to assess the GCL of patients with multiple sclerosis 24 Hours
Secondary Retinal Nerve Fiber Layer measurement (RNFL: peri-papillary OCT) Optical Coherence Tomography (OCT) will be used to assess the RNFL of patients with multiple sclerosis 24 Hours
Secondary Macular ganglion cell-inner plexiform layer thickness measurement (GCIPL) Optical Coherence Tomography (OCT) will be used to assess the GCIPL of patients with multiple sclerosis 24 Hours
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