Effects of next generation lighting system that selectively stimulates and controls intrinsically photosensitive retinal ganglion cells (ipRGCs) on human circadian rhythms

Effects of next generation lighting system that selectively stimulates and controls intrinsically photosensitive retinal ganglion cells (ipRGCs) on human circadian rhythms - Effects of next generation lighting system that selectively stimulates and controls intrinsically photosensitive retinal ganglion cells (ipRGCs) on human circadian rhythms

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000052341

Enrollment

Registered

2023-12-25

Start date

2023-12-25

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy adults

Interventions

Light with different control methods

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Since the purpose is to collect basic data, the study will be conducted with adults, not the elderly.

Exclusion criteria

Exclusion criteria: (1) Patients with a result score of 3 or 4 on the Cornell Medical Index for neurosis emotional disorders (2) Extreme morning person or extreme night person in Mornings Eveningness Questionnaire (3) Pittsburgh Sleep Questionnaire with a score of 6 or higher (4) Those who have had a change in their living hours due to shift work or travel to time zones within one month (5) Those who are taking any oral medication or smoking (6) Those who has color vision variation (7) Students who are currently enrolled or may be enrolled in a course that the principal investigator is taking

Design outcomes

Primary

Measure	Time frame
Phase shift in rectal temperature	—

Countries

Japan

Contacts

Public ContactTomoko Wakamura

Kyoto University Human Health Sciences, Graduate School of Medicine

wakamura.tomoko.5v@kyoto-u.ac.jp81-75-751-3974

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026