Eye Movement Behaviour and Pupil Size in Natural Outdoor and Indoor Scenes
- Conditions
- Light Sensitivity
- Interventions
- Other: Indoor vs. outdoor scenes
- Registration Number
- NCT05971238
- Lead Sponsor
- Technical University of Munich
- Brief Summary
In this study, the researchers will be using eye tracking and detailed lighting measurements to understand how different types of indoor and outdoor lighting affect the eye movements and pupil sizes of our participants. Participants will be paired up and undergo six eye tracking sessions, split across two appointments. Each appointment will involve viewing either indoor or outdoor scenes, and before each session, participants will spend time adapting to the lighting conditions. Overall, each participant will spend 24 minutes being tracked, and the entire study will take about 2-3 hours to complete. The investigators expect differences in eye movements and pupil size between indoor and outdoor scenes.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- RECRUITING
- Sex
- All
- Target Recruitment
- 24
- No previous eye-surgeries or ocular impairments like anisometropia, amblyopia, strabism, cataract, watery eyes or hanging eye lids
- Normal or corrected-to-normal visual acuity (+3dpt. to -5dpt.)
- Normal colour vision
- Normal binocular vision
- Any use of medications or drugs that influence photosensitivity or the ability to concentrate
- Excessive alcohol and/or drug use
- Presence of psychiatric disorders
- Poor sleep quality
- Diagnosed with epilepsy
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Eye-tracking, pupillometry and scene rating indoors & outdoors Indoor vs. outdoor scenes -
- Primary Outcome Measures
Name Time Method Fixation frequency - Outdoor scene 1 Baseline Number per minute \[n/min\]
Pupil size - Indoor scene 2 Baseline Mean pupil size \[mm\]
Melanopic irradiance - Indoor scene 2 Baseline Irradiance \[W/(sqm\*nm)\]
Melanopic irradiance - Outdoor scene 1 Baseline Irradiance \[W/(sqm\*nm)\]
Saccade frequency - Outdoor scene 1 Baseline Number per second \[n/s\]
Saccade frequency - Outdoor scene 3 Baseline Number per second \[n/s\]
Saccade amplitude - Indoor scene 2 Baseline Mean angular distance traveled \[°\]
Saccade velocity - Outdoor scene 2 Baseline Mean peak velocity \[°/s\]
Fixation duration - Outdoor scene 1 Baseline Mean fixation duration \[s\]
Fixation duration - Outdoor scene 2 Baseline Mean fixation duration \[s\]
Pupil size - Outdoor scene 3 Baseline Mean pupil size \[mm\]
Saccade frequency - Indoor scene 2 Baseline Number per second \[n/s\]
Saccade frequency - Indoor scene 3 Baseline Number per second \[n/s\]
Saccade amplitude - Outdoor scene 2 Baseline Mean angular distance traveled \[°\]
Fixation duration - Outdoor scene 3 Baseline Mean fixation duration \[s\]
Photopic illuminance - Outdoor scene 3 Baseline Illuminance \[lux\]
Saccade frequency - Outdoor scene 2 Baseline Number per second \[n/s\]
Saccade amplitude - Indoor scene 1 Baseline Mean angular distance traveled \[°\]
Saccade amplitude - Outdoor scene 1 Baseline Mean angular distance traveled \[°\]
Photopic illuminance - Indoor scene 2 Baseline Illuminance \[lux\]
Saccade frequency - Indoor scene 1 Baseline Number per second \[n/s\]
Saccade amplitude - Outdoor scene 3 Baseline Mean angular distance traveled \[°\]
Fixation duration - Indoor scene 2 Baseline Mean fixation duration \[s\]
Fixation duration - Indoor scene 3 Baseline Mean fixation duration \[s\]
Pupil size - Indoor scene 1 Baseline Mean pupil size \[mm\]
Pupil size - Outdoor scene 2 Baseline Mean pupil size \[mm\]
Saccade amplitude - Indoor scene 3 Baseline Mean angular distance traveled \[°\]
Saccade velocity - Indoor scene 3 Baseline Mean peak velocity \[°/s\]
Saccade velocity - Outdoor scene 3 Baseline Mean peak velocity \[°/s\]
Fixation duration - Indoor scene 1 Baseline Mean fixation duration \[s\]
Fixation frequency - Indoor scene 3 Baseline Number per minute \[n/min\]
Saccade velocity - Indoor scene 1 Baseline Mean peak velocity \[°/s\]
Saccade velocity - Indoor scene 2 Baseline Mean peak velocity \[°/s\]
Saccade velocity - Outdoor scene 1 Baseline Mean peak velocity \[°/s\]
Fixation frequency - Indoor scene 1 Baseline Number per minute \[n/min\]
Fixation frequency - Indoor scene 2 Baseline Number per minute \[n/min\]
Fixation frequency - Outdoor scene 2 Baseline Number per minute \[n/min\]
Fixation frequency - Outdoor scene 3 Baseline Number per minute \[n/min\]
Photopic illuminance - Indoor scene 1 Baseline Illuminance \[lux\]
Photopic illuminance - Outdoor scene 1 Baseline Illuminance \[lux\]
Photopic illuminance - Outdoor scene 2 Baseline Illuminance \[lux\]
Pupil size - Indoor scene 3 Baseline Mean pupil size \[mm\]
Pupil size - Outdoor scene 1 Baseline Mean pupil size \[mm\]
Melanopic irradiance - Indoor scene 3 Baseline Irradiance \[W/(sqm\*nm)\]
Melanopic irradiance - Outdoor scene 2 Baseline Irradiance \[W/(sqm\*nm)\]
Photopic illuminance - Indoor scene 3 Baseline Illuminance \[lux\]
Melanopic irradiance - Indoor scene 1 Baseline Irradiance \[W/(sqm\*nm)\]
Melanopic irradiance - Outdoor scene 3 Baseline Irradiance \[W/(sqm\*nm)\]
- Secondary Outcome Measures
Name Time Method Geographical scene location - Indoor scene 1 Baseline Longitude and latitude \[°\]
Geographical scene location - Outdoor scene 2 Baseline Longitude and latitude \[°\]
Ambient temperature - Indoor scene 2 Baseline Temperature \[°C\]
Ambient temperature - Outdoor scene 2 Baseline Temperature \[°C\]
Ambient temperature - Outdoor scene 3 Baseline Temperature \[°C\]
Subjective scene ratings - Indoor scene 3 Baseline * Unabbreviated scale titles (1)., min. and max, values (2.), score assessment (3.):
* 1. "How beautiful is this scene to you?" 2. "1 = not beautiful at all; 10 = extremely beautiful" 3. No better or worse outcome
* 1. "How would you rate the brightness of this scene?" 2. "1 = dimly lit room; 10 = bright sunny day" 3. No better or worse outcome
* 1. "How visually comfortable did you find this scene?" 2. "1 = No discomfort; 10 = Very uncomfortable" 3. No better or worse outcome
* 1. "How would you rate the complexity of the scene (e.g. colour contrasts, different object identities, moving objects)?" 2. "1 = very simple; 10 = Very complex" 3. No better or worse outcome
* 1. "How sleepy do you currently feel" 2. "1 = Extremely alert; 10 = Extremely sleep, can't keep awake" 3. Lower score is betterGeographical scene location - Outdoor scene 3 Baseline Longitude and latitude \[°\]
Ambient temperature - Indoor scene 1 Baseline Temperature \[°C\]
Geographical scene location - Outdoor scene 1 Baseline Longitude and latitude \[°\]
Subjective scene ratings - Indoor scene 1 Baseline * Unabbreviated scale titles (1)., min. and max, values (2.), score assessment (3.):
* 1. "How beautiful is this scene to you?" 2. "1 = not beautiful at all; 10 = extremely beautiful" 3. No better or worse outcome
* 1. "How would you rate the brightness of this scene?" 2. "1 = dimly lit room; 10 = bright sunny day" 3. No better or worse outcome
* 1. "How visually comfortable did you find this scene?" 2. "1 = No discomfort; 10 = Very uncomfortable" 3. No better or worse outcome
* 1. "How would you rate the complexity of the scene (e.g. colour contrasts, different object identities, moving objects)?" 2. "1 = very simple; 10 = Very complex" 3. No better or worse outcome
* 1. "How sleepy do you currently feel" 2. "1 = Extremely alert; 10 = Extremely sleep, can't keep awake" 3. Lower score is betterSubjective scene ratings - Indoor scene 2 Baseline * Unabbreviated scale titles (1)., min. and max, values (2.), score assessment (3.):
* 1. "How beautiful is this scene to you?" 2. "1 = not beautiful at all; 10 = extremely beautiful" 3. No better or worse outcome
* 1. "How would you rate the brightness of this scene?" 2. "1 = dimly lit room; 10 = bright sunny day" 3. No better or worse outcome
* 1. "How visually comfortable did you find this scene?" 2. "1 = No discomfort; 10 = Very uncomfortable" 3. No better or worse outcome
* 1. "How would you rate the complexity of the scene (e.g. colour contrasts, different object identities, moving objects)?" 2. "1 = very simple; 10 = Very complex" 3. No better or worse outcome
* 1. "How sleepy do you currently feel" 2. "1 = Extremely alert; 10 = Extremely sleep, can't keep awake" 3. Lower score is betterSubjective scene ratings - Outdoor scene 2 Baseline * Unabbreviated scale titles (1)., min. and max, values (2.), score assessment (3.):
* 1. "How beautiful is this scene to you?" 2. "1 = not beautiful at all; 10 = extremely beautiful" 3. No better or worse outcome
* 1. "How would you rate the brightness of this scene?" 2. "1 = dimly lit room; 10 = bright sunny day" 3. No better or worse outcome
* 1. "How visually comfortable did you find this scene?" 2. "1 = No discomfort; 10 = Very uncomfortable" 3. No better or worse outcome
* 1. "How would you rate the complexity of the scene (e.g. colour contrasts, different object identities, moving objects)?" 2. "1 = very simple; 10 = Very complex" 3. No better or worse outcome
* 1. "How sleepy do you currently feel" 2. "1 = Extremely alert; 10 = Extremely sleep, can't keep awake" 3. Lower score is betterAmbient temperature - Outdoor scene 1 Baseline Temperature \[°C\]
Subjective scene ratings - Outdoor scene 1 Baseline * Unabbreviated scale titles (1)., min. and max, values (2.), score assessment (3.):
* 1. "How beautiful is this scene to you?" 2. "1 = not beautiful at all; 10 = extremely beautiful" 3. No better or worse outcome
* 1. "How would you rate the brightness of this scene?" 2. "1 = dimly lit room; 10 = bright sunny day" 3. No better or worse outcome
* 1. "How visually comfortable did you find this scene?" 2. "1 = No discomfort; 10 = Very uncomfortable" 3. No better or worse outcome
* 1. "How would you rate the complexity of the scene (e.g. colour contrasts, different object identities, moving objects)?" 2. "1 = very simple; 10 = Very complex" 3. No better or worse outcome
* 1. "How sleepy do you currently feel" 2. "1 = Extremely alert; 10 = Extremely sleep, can't keep awake" 3. Lower score is betterSubjective scene ratings - Outdoor scene 3 Baseline * Unabbreviated scale titles (1)., min. and max, values (2.), score assessment (3.):
* 1. "How beautiful is this scene to you?" 2. "1 = not beautiful at all; 10 = extremely beautiful" 3. No better or worse outcome
* 1. "How would you rate the brightness of this scene?" 2. "1 = dimly lit room; 10 = bright sunny day" 3. No better or worse outcome
* 1. "How visually comfortable did you find this scene?" 2. "1 = No discomfort; 10 = Very uncomfortable" 3. No better or worse outcome
* 1. "How would you rate the complexity of the scene (e.g. colour contrasts, different object identities, moving objects)?" 2. "1 = very simple; 10 = Very complex" 3. No better or worse outcome
* 1. "How sleepy do you currently feel" 2. "1 = Extremely alert; 10 = Extremely sleep, can't keep awake" 3. Lower score is betterGeographical scene location - Indoor scene 2 Baseline Longitude and latitude \[°\]
Geographical scene location - Indoor scene 3 Baseline Longitude and latitude \[°\]
Ambient temperature - Indoor scene 3 Baseline Temperature \[°C\]
Trial Locations
- Locations (1)
Max Planck Institute for Biological Cybernetics
🇩🇪Tübingen, Germany