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.
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Saccade frequency - Indoor scene 1
Timeframe: Baseline
Saccade frequency - Indoor scene 2
Timeframe: Baseline
Saccade frequency - Indoor scene 3
Timeframe: Baseline
Saccade frequency - Outdoor scene 1
Timeframe: Baseline
Saccade frequency - Outdoor scene 2
Timeframe: Baseline
Saccade frequency - Outdoor scene 3
Timeframe: Baseline
Saccade amplitude - Indoor scene 1
Timeframe: Baseline
Saccade amplitude - Indoor scene 2
Timeframe: Baseline
Saccade amplitude - Indoor scene 3
Timeframe: Baseline
Saccade amplitude - Outdoor scene 1
Timeframe: Baseline
Saccade amplitude - Outdoor scene 2
Timeframe: Baseline
Saccade amplitude - Outdoor scene 3
Timeframe: Baseline
Saccade velocity - Indoor scene 1
Timeframe: Baseline
Saccade velocity - Indoor scene 2
Timeframe: Baseline
Saccade velocity - Indoor scene 3
Timeframe: Baseline
Saccade velocity - Outdoor scene 1
Timeframe: Baseline
Saccade velocity - Outdoor scene 2
Timeframe: Baseline
Saccade velocity - Outdoor scene 3
Timeframe: Baseline
Fixation duration - Indoor scene 1
Timeframe: Baseline
Fixation duration - Indoor scene 2
Timeframe: Baseline
Fixation duration - Indoor scene 3
Timeframe: Baseline
Fixation duration - Outdoor scene 1
Timeframe: Baseline
Fixation duration - Outdoor scene 2
Timeframe: Baseline
Fixation duration - Outdoor scene 3
Timeframe: Baseline
Fixation frequency - Indoor scene 1
Timeframe: Baseline
Fixation frequency - Indoor scene 2
Timeframe: Baseline
Fixation frequency - Indoor scene 3
Timeframe: Baseline
Fixation frequency - Outdoor scene 1
Timeframe: Baseline
Fixation frequency - Outdoor scene 2
Timeframe: Baseline
Fixation frequency - Outdoor scene 3
Timeframe: Baseline
Pupil size - Indoor scene 1
Timeframe: Baseline
Pupil size - Indoor scene 2
Timeframe: Baseline
Pupil size - Indoor scene 3
Timeframe: Baseline
Pupil size - Outdoor scene 1
Timeframe: Baseline
Pupil size - Outdoor scene 2
Timeframe: Baseline
Pupil size - Outdoor scene 3
Timeframe: Baseline
Melanopic irradiance - Indoor scene 1
Timeframe: Baseline
Melanopic irradiance - Indoor scene 2
Timeframe: Baseline
Melanopic irradiance - Indoor scene 3
Timeframe: Baseline
Melanopic irradiance - Outdoor scene 1
Timeframe: Baseline
Melanopic irradiance - Outdoor scene 2
Timeframe: Baseline
Melanopic irradiance - Outdoor scene 3
Timeframe: Baseline
Photopic illuminance - Indoor scene 1
Timeframe: Baseline
Photopic illuminance - Indoor scene 2
Timeframe: Baseline
Photopic illuminance - Indoor scene 3
Timeframe: Baseline
Photopic illuminance - Outdoor scene 1
Timeframe: Baseline
Photopic illuminance - Outdoor scene 2
Timeframe: Baseline
Photopic illuminance - Outdoor scene 3
Timeframe: Baseline