Exploration Strategies in Night Vision Sensors

NCT07352904 | Not Yet Recruiting

• 1 other identifier: 2025-A00047-42
• Study Type: observational
• Target: 10
• Locations: 0 countries
• Sites: N/A

Brief Summary

The main objective of this clinical trial is to identify a variation in visual strategy characterized by both head movements and eye movements of healthy volunteers during a target detection task when images simulating night vision goggles (NVG) are presented, compared to a situation in which the images simulate a natural environment. To highlight changes in environmental scanning with simulated images from NVG, objective measurements will be collected:

• eye movements characterized by saccades (speed, latency, and number) for each stimulus
• head movements (horizontal angle of the participant's head) for each stimulus and throughout the exposure Participants sit facing a screen (9.90 m x 2.10 m) onto which a virtual scene is projected. The objective is to correctly identify, as quickly as possible, a target stimulus (represented by a tank) that may appear in the scene. They must use the directional arrows on a game controller to indicate whether the tank is moving to the left or to the right. There are four visits involving four viewing conditions in which the task remains the same:
• With restricted field of view and a normal scene.
• Without restricted field of view and a scene simulating the vision obtained by NVGs.
• With restricted field of view and a scene simulating the vision obtained by NVGs.
• Without restricted field of view and a normal scene. Regarding the content of the scene, half of the tests in each visit involve a so-called poor scene when fog is simulated, or an enriched scene when there is no fog. Each visit lasts approximately one hour and thirty minutes.

Conditions

Visual Acuity

Keywords

visual strategy; Night Vision Goggles; eyetracking; visual fatigue

Outcome Measures

Primary Outcomes (2)

• Eye movements characterized by saccades (speed, latency, and number) for each stimulus

  Measurements from eyetracker

  Day 1 (Visit 1) and during follow-up visits at Day 2 (Visit 2), Day 3 (Visit 3), and Day 4 (Visit 4)

• Head movements (horizontal angle of the participant's head) for each stimulus and throughout the exposure

  Measurements extract from motion capture

  Day 1 (Visit 1) and during follow-up visits at Day 2 (Visit 2), Day 3 (Visit 3), and Day 4 (Visit 4)

Secondary Outcomes (3)

• The average stimulus detection times.

  Day 1 (Visit 1) and during follow-up visits at Day 2 (Visit 2), Day 3 (Visit 3), and Day 4 (Visit 4)

• Number of correct responses to the perceptual task

  Day 1 (Visit 1) and during follow-up visits at Day 2 (Visit 2), Day 3 (Visit 3), and Day 4 (Visit 4)

• Visual fatigue will be measured using a questionnaire

  Day 1 (Visit 1) and during follow-up visits at Day 2 (Visit 2), Day 3 (Visit 3), and Day 4 (Visit 4)

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

French volunteers

You may qualify if:

• Affiliated with social security;
• Normal vision or vision corrected with lenses (far vision ≤ 0.03 log unit (≥ 9/10) OD/OG/binocular);
• No current or past ocular or binocular pathology: strabismus or amblyopia;
• Signed non-objection form.

You may not qualify if:

• Pregnant or breastfeeding women;
• Incapacitated adults;
• Individuals who do not understand French (written or spoken).

Sponsors & Collaborators

• Direction Centrale du Service de Santé des Armées: lead

MeSH Terms

Conditions

Asthenopia

Condition Hierarchy (Ancestors)

Eye Diseases

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 18, 2025
• First Posted: January 20, 2026
• Study Start: February 1, 2026
• Primary Completion (Estimated): December 25, 2026
• Study Completion (Estimated): December 25, 2026
• Last Updated: January 20, 2026

Record last verified: 2026-01