Full-spectrum light exposure
OtherSubjects will stay in a room with full spectrum light for 5 minutes. After 5 minutes wash-out period, altenate to the other arm.
NCT Number: NCT06501131
Previous studies have shown that the spectrum of light influences myopia. LED lights with a partially absent light spectrum increase the risk of myopia progression compared to LEDs with a full spectrum, potentially mediated by the excitability of the parasympathetic nervous system. This study intends to compare pupil size and area, as well as parameters regulated by the autonomic nervous system (such as skin bioelectrical activity and heart rate), between LEDs with a full visible spectrum and LEDs with a partially absent spectrum around 470nm and 730nm. We aim to elucidate the physiological mechanism underlying the effect of light spectrum on pupil changes and myopia.
Trial opening soon.
Get Notified7 year–45 year
All sexes
Interventional
Not applicable
Healthy volunteers accepted: Yes
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
Exclusion criteria
Subjects will stay in a room with full spectrum light for 5 minutes. After 5 minutes wash-out period, altenate to the other arm.
Subjects will stay in a room with ordinary LED light for 5 minutes. After 5 minutes wash-out period, altenate to the other arm.
Time frame: 5 minutes
The pupil diameter is measured in real-time using the Eyelink Portable Duo eye tracker.
Time frame: 5 minutes
Rapidly changing and short-duration skin surface potentials measured in real-time using the Biopac MP160 multi-channel physiological recorder.
Time frame: 5 minutes
The amplitude of respiratory movements measured in real-time using the Biopac MP160 multi-channel physiological recorder.
Time frame: 5 minutes
The amplitude of respiratory movements measured in real-time using the Biopac MP160 multi-channel physiological recorder.
Time frame: 5 minutes
Measured with autorefractor and defined as the sum of spherical power and half of the cylinder power.
Time frame: 5 minutes
Visual acuity without refractive correction.
Time frame: 5 minutes
Uncorrected visual acuity: Visual acuity without refractive correction.
Time frame: 5 minutes
Anterior corneal curvature measured by the Pentacam corneal topographer
Contact information is provided by the study sponsor or research team.
Zhongshan Ophthalmic Center, Sun Yat-sen University
Other
The Impact of Partial Visible Light Spectrum Absence on Pupil Response and Autonomic Nervous System Excitability: A Cross-Over Randomized Controlled Trial
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