Verification of factors preventing the onset of "esotropia associated smartphone" using eye movement analysis during smartphone viewing

Verification of factors preventing the onset of "esotropia associated smartphone" using eye movement analysis during smartphone viewing - Verification of factors preventing the onset of "esotropia associated smartphone" using eye movement analysis during smartphone viewing

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000055167

Enrollment

Registered

2024-08-10

Start date

2024-09-01

Completion date

Unknown

Last updated

2026-09-14

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

Conditions

normal subject

Interventions

Voluntary blinks every 2 minutes during viewing smartphone Far-sighted saccades every 2 minutes during viewing smartphone No intervention

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: (1) Healthy individuals between the ages of 18 and 30 who have given consent to participate in the study (2) No manifest strabismus (3) Corrected visual acuity of 1.0 or better in both eyes (4) Normal stereopsis (near stereopsis of 60 seconds or less) (5) No history of amblyopia.

Exclusion criteria

Exclusion criteria: (1) Not wish to participate in this study (2) A history of central nervous system disease or systemic disease that may affect eye position or eye movement (3) unable to use a smartphone for more than 30 minutes continuously (4) Determined to be inappropriate by the researcher

Design outcomes

Primary

Measure	Time frame
ocular deviation angle at far (5m)	—

Secondary

Measure	Time frame
ocular deviation angle at near (30cm), refraction error (binocular, monocular), accommodative function, near stereopsis, far stereopsis, presence of diplopia, number of blinks during viewing smartphone, number of saccades during viewing smartphone, range of gaze fixation during viewing smartphone, pupil diameter during viewing smartphone, distance between smartphone and eye during viewing smartphone, CVS-Q score, adverse events	—

Measure

Time frame

ocular deviation angle at near (30cm), refraction error (binocular, monocular), accommodative function, near stereopsis, far stereopsis, presence of diplopia, number of blinks during viewing smartphone, number of saccades during viewing smartphone, range of gaze fixation during viewing smartphone, pupil diameter during viewing smartphone, distance between smartphone and eye during viewing smartphone, CVS-Q score, adverse events

—

Countries

Japan

Contacts

Public ContactMiharu Mihara

University of Toyama Ophthalmology

miharu@med.u-toyama.ac.jp+81-76-434-7363

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Sep 19, 2026

Verification of factors preventing the onset of &quot;esotropia associated smartphone&quot; using eye movement analysis during smartphone viewing