Optical Coherence Tomography in Neurological Practice: Utility and Applicability Across Neurological Diseases (OCt.IN.N) (OCT)

July 17, 2026 updated by: Prof. Massimo Filippi, IRCCS San Raffaele

A National, Monocentric, Prospective Cohort Study to Evaluate the Utility and Applicability of Optical Coherence Tomography in Neurological Clinical Practice

OCt.IN.N is a national, monocentric, prospective, observational cohort study evaluating the utility and applicability of Optical Coherence Tomography (OCT) in the diagnostic workup and longitudinal monitoring of neurological diseases.

840 patients with Central Nervous System neurological diseases (Multiple Sclerosis, Alzheimer's disease, Parkinson's disease, migraine/headache) and 210 age-matched healthy controls will undergo OCT examination at baseline and at 6, 12, 18, and 24 months of follow-up at IRCCS San Raffaele Hospital, Milan, Italy.

OCT is a non-invasive, rapid, and reproducible technique that automatically measures the thickness of individual retinal layers. Retinal layer thicknesses and their longitudinal changes will be correlated with established clinical scales, neuroimaging, and biological markers used in routine neurological practice.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The retina and optic nerve share the same embryological origins as the central nervous system (CNS). Several neurological diseases - including Multiple Sclerosis (MS), Parkinson's disease (PD), and Alzheimer's disease (AD) - involve the visual system at both pre-chiasmatic (neuro-retina, optic nerve) and post-chiasmatic levels (optic tracts, optic radiations, primary visual cortex).

In MS, optic neuritis is one of the most frequent manifestations and can lead to optic nerve damage with retinal nerve fiber degeneration. In neurodegenerative diseases such as AD and PD, degeneration of retinal ganglion cells has been demonstrated. In AD, longitudinal observational studies have shown accelerated RNFL thinning over time compared to age-matched healthy controls, suggesting that neuro-retinal thinning in neurodegeneration reflects underlying neurodegenerative processes independent of normal aging.

Spectral-domain Optical Coherence Tomography (OCT) is a non-invasive, highly reproducible technique providing automated, high-resolution information on the thickness of individual retinal layers, including the retinal nerve fiber layer (RNFL), the ganglion cell layer (GCL), and the inner plexiform layer (IPL). OCT could represent a reliable, reproducible, and economically accessible tool for the diagnostic workup and monitoring of neurological diseases.

The device used is the Heidelberg SPECTRALIS HRA+OCT (Class IIa CE-marked medical device), operated according to the manufacturer's instructions and indications for use. The device is used according to its approved clinical indication for visualization of the posterior segment of the eye and retinal anatomy measurement.

Study design: monocentric, prospective, observational cohort study. Patients are recruited from the neurology outpatient clinics and inpatient wards of IRCCS San Raffaele Hospital. OCT is performed at baseline (T0) and at follow-up visits at 6, 12, 18, and/or 24 months. Ophthalmological evaluation may be requested at the investigators' discretion to exclude concurrent ocular pathology.

Three age subgroups are analyzed for all disease groups and controls: 20-40 years, 40-60 years, and over 60 years.

Statistical analyses include: descriptive statistics and ANOVA models (or non-parametric tests) for between-group comparisons at baseline; linear mixed-effects models for longitudinal changes over time; generalized estimating equations (GEE) when data from both eyes are considered; Pearson or Spearman correlation analyses between OCT measures and clinical, neuroimaging, and biological markers (EDSS for MS; UPDRS for PD; neuropsychological battery for AD; brain MRI, PET, and CSF biomarkers for migraine/headache).

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
1050

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Roberto Santangelo, MD

Study Locations

  • Italy
    • Milano
      • Milan, Milano, Italy, 20132
        • Recruiting
        • IRCCS Ospedale San Raffaele - Neurology and Neurophysiology Unit
        • Contact:
        • Principal Investigator:
          • Massimo Filippi, Prof, MD
        • Sub-Investigator:
          • Federica Agosta, MD
        • Sub-Investigator:
          • Roberto Santangelo, MD
        • Contact:
          • Roberto Santangelo, MD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adult patients with a diagnosis of a Central Nervous System neurological disease (Multiple Sclerosis; Alzheimer's disease; Parkinson's disease; migraine/headache) recruited from the neurology outpatient clinics and inpatient wards of IRCCS San Raffaele Hospital, Milan, Italy. Healthy controls recruited primarily from medical students, colleagues, and relatives of patients.

Description

Inclusion Criteria for neurological patients:

  1. Diagnosis of a Central Nervous System neurological disease (inflammatory diseases such as Multiple Sclerosis; neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease; migraine/headache) according to currently accepted diagnostic criteria for each condition.
  2. Age greater than 18 years.
  3. Signed informed consent to study participation.
  4. Willingness and ability to undergo all study visits and procedures.

Inclusion Criteria for healthy controls:

  1. Absence of neurological disease.
  2. Age greater than 18 years.
  3. Signed informed consent to study participation.
  4. Willingness and ability to undergo all study visits and procedures.

Exclusion Criteria for neurological patients:

  1. Refusal to participate or withdrawal of informed consent.
  2. Known or confirmed ocular pathology identified during examination (ophthalmological evaluation may be requested at the investigators' discretion).
  3. Inability to understand instructions given by investigators.
  4. Presence of any condition that, in the investigators' opinion, renders the subject unsuitable for the study.
  5. For specific imaging modes using clearly visible light sources (MultiColor, FA, BAF): diagnosis of epilepsy or history of previous epileptic seizures.

Exclusion Criteria for healthy controls:

  1. Refusal to participate or withdrawal of informed consent.
  2. Known or confirmed ocular pathology identified during examination.
  3. Inability to understand instructions given by investigators.
  4. Presence of any condition that, in the investigators' opinion, renders the subject unsuitable for the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Multiple Sclerosis patients
210 patients with a diagnosis of Multiple Sclerosis according to current diagnostic criteria, stratified into three age subgroups (20-40, 40-60, and over 60 years, 70 per subgroup). Undergo OCT at baseline and follow-up visits at 6, 12, 18, and/or 24 months, alongside standard clinical assessments including EDSS.
Device: Optical Coherence Tomography (OCT) - Heidelberg SPECTRALIS HRA+OCT

Spectral-domain Optical Coherence Tomography (OCT) performed using the Heidelberg SPECTRALIS HRA+OCT device (Class IIa CE-marked medical device). The procedure is non-invasive: the patient sits in front of the device and is asked to fix a target (light or cross) through a lens. No drugs or contrast agents are administered. OCT automatically acquires images of the macular region (where GCL and IPL are most represented) and the optic nerve head region (where RNFL is most represented), providing automated measurements of the thickness of individual retinal layers.

OCT is performed at baseline and at follow-up visits at 6, 12, 18, and/or 24 months. Ophthalmological evaluation may be performed at the investigators' discretion if OCT images, clinical symptoms, or medical history suggest concurrent ocular pathology. Patients with a known diagnosis of epilepsy or history of epileptic seizures will not undergo specific imaging modes using clearly visible light sources (MultiColor, FA, BAF).
Alzheimer's disease patients
210 patients with a diagnosis of Alzheimer's disease according to current diagnostic criteria, stratified into three age subgroups (70 per subgroup). Undergo OCT at baseline and follow-up visits alongside standard neuropsychological assessments, brain MRI, PET, and CSF biomarkers as part of routine clinical care.
Device: Optical Coherence Tomography (OCT) - Heidelberg SPECTRALIS HRA+OCT

Spectral-domain Optical Coherence Tomography (OCT) performed using the Heidelberg SPECTRALIS HRA+OCT device (Class IIa CE-marked medical device). The procedure is non-invasive: the patient sits in front of the device and is asked to fix a target (light or cross) through a lens. No drugs or contrast agents are administered. OCT automatically acquires images of the macular region (where GCL and IPL are most represented) and the optic nerve head region (where RNFL is most represented), providing automated measurements of the thickness of individual retinal layers.

OCT is performed at baseline and at follow-up visits at 6, 12, 18, and/or 24 months. Ophthalmological evaluation may be performed at the investigators' discretion if OCT images, clinical symptoms, or medical history suggest concurrent ocular pathology. Patients with a known diagnosis of epilepsy or history of epileptic seizures will not undergo specific imaging modes using clearly visible light sources (MultiColor, FA, BAF).
Parkinson's disease patients
210 patients with a diagnosis of Parkinson's disease according to current diagnostic criteria, stratified into three age subgroups (70 per subgroup). Undergo OCT at baseline and follow-up visits alongside standard clinical assessments including UPDRS.
Device: Optical Coherence Tomography (OCT) - Heidelberg SPECTRALIS HRA+OCT

Spectral-domain Optical Coherence Tomography (OCT) performed using the Heidelberg SPECTRALIS HRA+OCT device (Class IIa CE-marked medical device). The procedure is non-invasive: the patient sits in front of the device and is asked to fix a target (light or cross) through a lens. No drugs or contrast agents are administered. OCT automatically acquires images of the macular region (where GCL and IPL are most represented) and the optic nerve head region (where RNFL is most represented), providing automated measurements of the thickness of individual retinal layers.

OCT is performed at baseline and at follow-up visits at 6, 12, 18, and/or 24 months. Ophthalmological evaluation may be performed at the investigators' discretion if OCT images, clinical symptoms, or medical history suggest concurrent ocular pathology. Patients with a known diagnosis of epilepsy or history of epileptic seizures will not undergo specific imaging modes using clearly visible light sources (MultiColor, FA, BAF).
Migraine and headache patients
210 patients with a diagnosis of migraine or headache according to current diagnostic criteria, stratified into three age subgroups (70 per subgroup). Undergo OCT at baseline and follow-up visits alongside standard clinical assessments.
Device: Optical Coherence Tomography (OCT) - Heidelberg SPECTRALIS HRA+OCT

Spectral-domain Optical Coherence Tomography (OCT) performed using the Heidelberg SPECTRALIS HRA+OCT device (Class IIa CE-marked medical device). The procedure is non-invasive: the patient sits in front of the device and is asked to fix a target (light or cross) through a lens. No drugs or contrast agents are administered. OCT automatically acquires images of the macular region (where GCL and IPL are most represented) and the optic nerve head region (where RNFL is most represented), providing automated measurements of the thickness of individual retinal layers.

OCT is performed at baseline and at follow-up visits at 6, 12, 18, and/or 24 months. Ophthalmological evaluation may be performed at the investigators' discretion if OCT images, clinical symptoms, or medical history suggest concurrent ocular pathology. Patients with a known diagnosis of epilepsy or history of epileptic seizures will not undergo specific imaging modes using clearly visible light sources (MultiColor, FA, BAF).
Healthy Controls
210 healthy subjects without neurological disease, age-matched to patients, stratified into three age subgroups (20-40, 40-60, and over 60 years, 70 per subgroup). Recruited primarily from medical students, colleagues, and relatives of patients. Undergo OCT at baseline and follow-up visits.
Device: Optical Coherence Tomography (OCT) - Heidelberg SPECTRALIS HRA+OCT

Spectral-domain Optical Coherence Tomography (OCT) performed using the Heidelberg SPECTRALIS HRA+OCT device (Class IIa CE-marked medical device). The procedure is non-invasive: the patient sits in front of the device and is asked to fix a target (light or cross) through a lens. No drugs or contrast agents are administered. OCT automatically acquires images of the macular region (where GCL and IPL are most represented) and the optic nerve head region (where RNFL is most represented), providing automated measurements of the thickness of individual retinal layers.

OCT is performed at baseline and at follow-up visits at 6, 12, 18, and/or 24 months. Ophthalmological evaluation may be performed at the investigators' discretion if OCT images, clinical symptoms, or medical history suggest concurrent ocular pathology. Patients with a known diagnosis of epilepsy or history of epileptic seizures will not undergo specific imaging modes using clearly visible light sources (MultiColor, FA, BAF).

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Annual rate of peripapillary RNFL thinning in patients with Multiple Sclerosis vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the peripapillary retinal nerve fiber layer (RNFL) measured by OCT in patients with Multiple Sclerosis compared to age-matched healthy controls.
Baseline, 6, 12, 18, and 24 months
Annual rate of peripapillary RNFL thinning in patients with Alzheimer's Disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the peripapillary retinal nerve fiber layer (RNFL) measured by OCT in patients with Alzheimer's Disease compared to age-matched healthy controls.
Baseline, 6, 12, 18, and 24 months
Annual rate of peripapillary RNFL thinning in patients with Parkinson's Disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the peripapillary retinal nerve fiber layer (RNFL) measured by OCT in patients with Parkinson's Disease compared to age-matched healthy controls.
Baseline, 6, 12, 18, and 24 months
Annual rate of macular GCL thinning in patients with Multiple Sclerosis disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the macular ganglion cell layer (GCL) measured by OCT in patients with Multiple Sclerosis compared to age-matched healthy controls
Baseline, 6, 12, 18, and 24 months
Annual rate of macular GCL thinning in patients with Alzheimer's Disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the macular ganglion cell layer (GCL) measured by OCT in patients with Alzheimer's Disease compared to age-matched healthy controls
Baseline, 6, 12, 18, and 24 months
Annual rate of macular GCL thinning in patients with Parkinson's Disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the macular ganglion cell layer (GCL) measured by OCT in patients with Parkinson's Disease compared to age-matched healthy controls
Baseline, 6, 12, 18, and 24 months
Annual rate of macular IPL thinning in patients with Multiple Sclerosis vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the macular inner plexiform layer (IPL) measured by OCT in patients with Multiple Sclerosis compared to age-matched healthy controls
Baseline, 6, 12, 18, and 24 months
Annual rate of macular IPL thinning in patients with Alzheimer's Disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the macular inner plexiform layer (IPL) measured by OCT in patients with Alzheimer's Disease compared to age-matched healthy controls
Baseline, 6, 12, 18, and 24 months
Annual rate of macular IPL thinning in patients with Parkinson's Disease vs healthy controls
Time Frame: Baseline, 6, 12, 18, and 24 months
Annualized thinning rate (micrometers per year) of the macular inner plexiform layer (IPL) measured by OCT in patients with Parkinson's Disease compared to age-matched healthy controls
Baseline, 6, 12, 18, and 24 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Correlation between RNFL thinning rate and EDSS worsening in Multiple Sclerosis
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized RNFL thinning rate measured by OCT and worsening on the Expanded Disability Status Scale (EDSS) in patients with Multiple Sclerosis.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thinning rate and EDSS worsening in Multiple Sclerosis
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized GCL thinning rate measured by OCT and worsening on the Expanded Disability Status Scale (EDSS) in patients with Multiple Sclerosis.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thinning rate and EDSS worsening in Multiple Sclerosis
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized IPL thinning rate measured by OCT and worsening on the Expanded Disability Status Scale (EDSS) in patients with Multiple Sclerosis.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thinning rate and UPDRS worsening in Parkinson's disease
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized RNFL thinning rate measured by OCT and worsening on the Unified Parkinson's Disease Rating Scale (UPDRS) in patients with Parkinson's disease.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thinning rate and UPDRS worsening in Parkinson's disease
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized GCL thinning rate measured by OCT and worsening on the Unified Parkinson's Disease Rating Scale (UPDRS) in patients with Parkinson's disease.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thinning rate and neuropsychological performance in Alzheimer's disease
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized RNFL thinning rate measured by OCT and scores on comprehensive neuropsychological assessment in patients with Alzheimer's disease.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thinning rate and neuropsychological performance in Alzheimer's disease
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized GCL thinning rate measured by OCT and scores on comprehensive neuropsychological assessment in patients with Alzheimer's disease.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thinning rate and neuropsychological performance in Alzheimer's disease
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between the annualized IPL thinning rate measured by OCT and scores on comprehensive neuropsychological assessment in patients with Alzheimer's disease.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thickness and brain MRI lesion load
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL tickness and brain MRI parameters (lesion load) used in routine clinical practice for each neurological disease subgroup.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thickness and brain MRI cortical atrophy
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL tickness and brain MRI parameters (cortical atrophy) used in routine clinical practice for each neurological disease subgroup.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and brain MRI lesion load
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL tickness and brain MRI parameters (lesion load) used in routine clinical practice for each neurological disease subgroup.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and brain MRI cortical atrophy
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL tickness and brain MRI parameters (cortical atrophy) used in routine clinical practice for each neurological disease subgroup.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thickness and brain MRI lesion load
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL tickness and brain MRI parameters (lesion load) used in routine clinical practice for each neurological disease subgroup.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thickness and brain MRI cortical atrophy
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL tickness and brain MRI parameters (cortical atrophy) used in routine clinical practice for each neurological disease subgroup.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thickness and PET findings
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL thickness and brain PET parameters used in routine clinical practice for applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and PET findings
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL thickness and brain PET parameters used in routine clinical practice for applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thickness and PET findings
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL thickness and brain PET parameters used in routine clinical practice for applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
24. Correlation between RNFL thickness and CSF biomarker (Abeta40)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL thickness and CSF biomarkers (Abeta40) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and CSF biomarker (Abeta40)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL thickness and CSF biomarkers (Abeta40) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
orrelation between IPL thickness and CSF biomarker (Abeta40)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL thickness and CSF biomarkers (Abeta40) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thickness and CSF biomarker (Abeta42)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL thickness and CSF biomarkers (Abeta42) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and CSF biomarker (Abeta42)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL thickness and CSF biomarkers (Abeta42) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thickness and CSF biomarker (Abeta42)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL thickness and CSF biomarkers (Abeta42) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thickness and CSF biomarkers (pTAU)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL thickness and CSF biomarkers (pTAU) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and CSF biomarkers (pTAU)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL thickness and CSF biomarkers (pTAU) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thickness and CSF biomarkers (pTAU)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL thickness and CSF biomarkers (pTAU) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between RNFL thickness and CSF biomarkers (NfL)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived RNFL thickness and CSF biomarkers (NfL) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between GCL thickness and CSF biomarkers (NfL)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived GCL thickness and CSF biomarkers (NfL) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months
Correlation between IPL thickness and CSF biomarkers (NfL)
Time Frame: Baseline, 6, 12, 18, and 24 months
Pearson or Spearman correlation between OCT-derived IPL thickness and CSF biomarkers (NfL) in applicable neurological disease subgroups.
Baseline, 6, 12, 18, and 24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
IRCCS San Raffaele

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Massimo Filippi, Prof, MD, IRCCS San Raffaele

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 9, 2023

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2030

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2031

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 17, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 17, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 22, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 22, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 17, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • OCtINN

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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