Pilot RCT of Computer-based Eye Movement Training (CRYSTAL)

August 3, 2026 updated by: Glasgow Caledonian University

Computer-based Eye Movement Training for Stroke-related Visual Field Loss: a Pilot Randomised Controlled Trial

The goal of this study is to learn whether NeuroEyeCoach, a computer-based eye movement training programme, can help stroke survivors with visual field loss. The study will also assess whether a larger clinical trial is feasible. The main questions it aims to answer are:

  • Can stroke survivors be successfully recruited, randomised and followed up in a larger trial?
  • Is NeuroEyeCoach acceptable and practical to use?
  • Is there early evidence that NeuroEyeCoach improves vision-related functioning and wellbeing? Researchers will compare NeuroEyeCoach plus usual care with usual care alone.

Participants will:

  • Be randomly assigned to receive NeuroEyeCoach plus usual care or usual care alone
  • Complete six weeks of training if allocated to NeuroEyeCoach
  • Complete questionnaires and tests of vision, daily activities, quality of life, confidence and wellbeing
  • Take part in follow-up assessments over six months This pilot trial will include 60 stroke survivors living with visual field loss after stroke. Findings will be used to inform the design of a larger study.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet 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.

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.
Interventional

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.
60

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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.

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

No

Description

Inclusion Criteria:

  • adult (>18 years)
  • stroke survivor
  • stroke-related homonymous VFL (minimum quadrantanopia)
  • sufficient language, cognitive, and upper limb ability to participate in trial activities.

Exclusion Criteria:

  • pre-existing (ie pre-stroke) registration as sight impaired (partially sighted) or severely sight impaired (blind)
  • • history of seizure disorders, especially those of a photosensitive nature

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

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
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.
Experimental: Eye movement training + usual care
Usual post-stroke care, plus eye movement training (VISIOcoach)
Device: NeuroEyeCoach eye movement training
computer based eye movement training for visual field loss in stroke
Other: Usual Care
Usual post-stroke care
Other: usual care
Usual post-stroke care
Other: Usual Care
Usual post-stroke care

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
Recruitment rate
Time Frame: through study completion, estimated at 15 months
Rate of recruitment to the trial
through study completion, estimated at 15 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
Retention Rate
Time Frame: through study completion, estimated at 15 months
Rate of retention of participants in the study
through study completion, estimated at 15 months
Screening and eligibility rate
Time Frame: Active screening period
Screening and eligibility rate
Active screening period
Outcome measure completion rate
Time Frame: over data collection period
through study completion, estimated at 15 months
over data collection period
intervention adherence
Time Frame: 6 weeks
adherence to recommended training regime (duration)
6 weeks
Adverse events
Time Frame: up to 6 weeks
any adverse eventa experienced
up to 6 weeks
Support and computer provision needs
Time Frame: up to 6 weeks
To what extent must technical equipment or assistance be given
up to 6 weeks
NEI VFQ 25 (National Eye Institute Visual Function Questionnaire-25)
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
Patient-reported measure of vision-related functioning. Minimum value is 0, and maximum value is 100; higher scores mean a better outcome
baseline, 6 weeks post randomisation, 6 months post randomisation
EQ-5D 5L
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
Generic health related quality of life Maximum value 1.0; better scores mean a better outcome
baseline, 6 weeks post randomisation, 6 months post randomisation
IReST (International Reading Speed Test)
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
Reading test (words per minute)
baseline, 6 weeks post randomisation, 6 months post randomisation
Melbourne Rapid Fields
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
visual field test
baseline, 6 weeks post randomisation, 6 months post randomisation
Confidence after Stroke Measure
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
Validated questionnaire that explores self-confidence, positive attitude and social confidence Minimum score is 0 and the maximum score is 81; a higher score indicates better outcome Ref: Horne JC, Lincoln NB, Logan PA. Measurement of confidence: the development and psychometric evaluation of a stroke-specific, measure of confidence. Clin Rehabil. 2017 Nov;31(11):1529-1537. doi: 10.1177/0269215517705424. Epub 2017 May 3. PMID: 28466669; PMCID: PMC5652651.
baseline, 6 weeks post randomisation, 6 months post randomisation
Warwick-Edinburgh Mental Wellbeing Scale
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
Mental wellbeing questionnaire Minimum raw score is 7 and the maximum raw score is 35; higher score means a better outcome
baseline, 6 weeks post randomisation, 6 months post randomisation
health care resource use
Time Frame: baseline, 6 weeks post randomisation, 6 months post randomisation
health care resource use, covering general, stroke specific, and vision specific resources
baseline, 6 weeks post randomisation, 6 months post randomisation

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.
Glasgow Caledonian University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Health Service, United Kingdom

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 (Estimated)

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 1, 2026

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.
July 31, 2027

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.
July 31, 2027

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).
December 3, 2025

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.
August 3, 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.
August 7, 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.
August 7, 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.
August 3, 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.
August 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.
  • HLS/LS/25/032
  • TCS/24/40 (Other Grant/Funding Number: Chief Scientist Office Scotland)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

We have not yet discussed and decided our IPD sharing position

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.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings