臨床研究等提出・公開システム

Date of registration	April. 12, 2024
Last modified on	Feb. 12, 2026
Trial ID	jRCT1030240025

Scientific Title	Factual investigation on Near Visual Function of Office Workers
Public Title	Factual investigation on Near Visual Function of Office Workers

Contact for Scientific Queries	Name	Negishi Kazuno
	Affiliation	Keio University School of Medicine
	Address	35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
	Telephone	+81-3-5363-3821
	E-mail	kazunonegishi@keio.jp
Contact for Public Queries	Name	Sachiko Masui
	Affiliation	Keio University School of Medicine
	Address	35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
	Telephone	+81-3-5363-3821
	E-mail	m.sac@keio.jp

Recruitment status	Complete

Anticipated date of first enrollment		April. 12, 2024
Target sample size		700
Study Type		Observational
Key inclusion & exclusion criteria	Inclusion Criteria	1. Men and women over 20 years old 2. Office workers who mainly perform VDT work 3. iPhone users (supported devices: iPhone X or later with TrueDepth camera, iOS 16 or later)
	Exclusion Criteria	1. Those who had severe visual impairment 2. Those who cannot operate a smartphone
	Age Minimum	20age old over
	Age Maximum	No limit
	Gender	Both
Health Condition(s) or Problem(s) Studied		Healthy individuals / presbyopia
Primary Outcome(s)		Near function visual acuity
Secondary Outcome(s)		-Presenteeism (QQ method) -Changes over time in fatigue status in VDT work (subjective symptom survey) -VDT work time -The Near Activity Visual Questionnaire (NAVQ)

Primary Sponsor	Department of Ophthalmology Keio University School of Medicine

Secondary Sponsor

Secondary Sponsor

Name of Certified Review Board	Keio University School of Medicine Ethics Committee
Address	35 Shinanomachi, Shinjuku-ku, Tokyo, Japan, Tokyo
Telephone	+81-3-5363-3503
E-Mail	med-rinri-jimu@adst.keio.ac.jp
Approval Status	Approval
Date of approval	Dec. 05, 2023

Plan to share IPD	No

Countries of Recruitment（Except Japan）	none

History of Changes

No	Publication date
3	Feb. 12, 2026	(this page)	Changes
2	May. 16, 2024	Detail	Changes
1	April. 12, 2024	Detail

List of change history