Effect of Yellow Light AG Mobile Phone Screen on Dry Eye and Asthenopia. (NCT07340359) | Clinical Trial Compass
CompletedNot Applicable
Effect of Yellow Light AG Mobile Phone Screen on Dry Eye and Asthenopia.
China70 participantsStarted 2026-01-10
Plain-language summary
This study aimed to evaluate the protective effects of yellow-light etching anti-glare (AG) screen on Digital Eye Strain (DES) induced by prolonged video display terminal (VDT) use under dim environment, Based on the proved positive effect of the circular polarization (CP) screen, providing insights for new eye-protection strategy in the highly digital modern era. In a randomized, double-blind controlled trial, 70 eligible volunteers (diopter ≤ -6.0D; anisometropia ≤ 2.0D) were divided into AG+CP or CP only groups. Participants performed a 2-hour e-book reading task using assigned AG+CP or CP only smartphones. Subjects' severity of DES pre- and post-reading were evaluated from two aspects: the degree of dry eye symptoms and asthenopia. Dry eye symptoms indicators (OSDI, TMH, NIBUT, FBUT, CFS, Schirmer I Test) and asthenopia indicators (CVSS17, Bulbar redness, HFC) were measured and compared.
Who can participate
Age range
18 Years – 40 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* 1.have basic reading comprehension skills and to be older than 18 years old. 2.diopter of both eyes not exceeding -6.0D and anisometropia not exceeding 2.0D.
Exclusion Criteria:
* 1.presbyopia or decreased regulation function, 2.ocular inflammation and disease, 3.worn contact lens within 1 month, 4.history of eye surgery within 6 months, 5.lactating or pregnant woman, 6.have severe systemic diseases.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1This trial tested a yellow light screen filter on dry eye and digital eye strain — since it's already completed, has any data been published, and could my doctor help me understand whether the results are relevant to my situation?
2The study measured tear break-up time and something called high frequency accommodative fluctuation — can my doctor explain what those measurements mean for my eye health and whether my own levels have ever been tested?
3Since this was a completed trial with no specific phase listed, what do we actually know about how safe and effective yellow light screen filters are compared to other approaches my doctor might already recommend, like artificial tears or blue light filters?
4My symptoms involve dry eyes and eye strain from screens — based on what this trial was studying, is a yellow light screen filter something worth trying alongside whatever treatment plan my doctor has in mind?
5Are there any standard, already-proven treatments for computer vision syndrome or dry eye that my doctor thinks I should try first, before considering newer approaches like the one studied in this trial?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Flourescence tear break-up time
Timeframe: 1 month
2
HFC (high frequency component of accommodative fluctuation)
Timeframe: 1 month
3
non-invasive tear break-up time
Timeframe: 1 month
Trial details
NCT IDNCT07340359
SponsorSecond Affiliated Hospital, School of Medicine, Zhejiang University