Study on chromatic pupil responses

Study on chromatic pupil responses in healthy subjects

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1032210258

Enrollment

Registered

2021-08-19

Start date

2021-08-19

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

Measurement of pupil dilation or constriction

Interventions

1. New type of pupillography: 1-1. Red light stimulus / 1-2. Blue light stimulus 2. Conventional type of pupillography: 2-1. Red light stimulus / 2-2. Blue light stimulus

Red light, Blue light

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Healthy subject

Exclusion criteria

Exclusion criteria: Smoking, alcohol or caffeine drinking

Design outcomes

Primary

Measure	Time frame
Percentage of pupil constriction	—

Secondary

Measure	Time frame
1. Pupil size before light stimulus 2. Pupil size after light stimulus	—

Contacts

Public ContactKen Asakawa

Kitasato University

asaken@kitasato-u.ac.jp+81-42-778-9667

Outcome results

None listed

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