Measurement experiment of the angle of convergence when watching videos on a smartphone

Measurement experiment of the angle of convergence when watching videos on a smartphone - Measurement experiment of the angle of convergence when watching videos on a smartphone

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000049527

Enrollment

300

Registered

2023-01-10

Start date

2022-12-01

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

No disease Healthy adult

Interventions

SiB eye-tracking is used to measure changes in viewing distance and angle of convergence for 30 minutes while watching videos on a smartphone.Comparative study of changes in convergence angle due to v

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: College students who use smartphones on a daily basis.Those who are interested in research in the area of visual function and voluntarily apply as subjects.

Exclusion criteria

Exclusion criteria: There are no exclusion criteria.

Design outcomes

Primary

Measure	Time frame
Using SiB eye tracking to measure changes in viewing distance and angle of convergence for 30 minutes while watching a video on a smartphone.	—

Secondary

Measure	Time frame
Objective refraction test, binocular visual function test, binocular vision test	—

Countries

Japan

Contacts

Public ContactMasako Ishii

Niigata University of Health and Welfare Department of Visual Science, Faculty of Medical Technology

ishii@nuhw.ac.jp025-257-4533

Outcome results

None listed

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