Healthy human volunteers belonging to the target population of the intervention Screen modes, Lighting conditions, Visual symptoms, Digital device
Conditions
Interventions
Testing in bright conditions with standard bright display mode.,Testing in bright lighting conditions with Night Shift mode.,Testing in dim lighting conditions with standard (bright) display mode.,Tes
Bright conditions/Bright mode,Bright conditions/Night shift mode,Dim conditions/Bright mode,Dim conditions/ Night shift mode
Sponsors
Faculty of Allied Health Sciences
Eligibility
Sex/Gender
All
Age
18 Years to 25 Years
Inclusion criteria
Inclusion criteria: - Aged between 18 and 25 years. - Best Corrected Visual Acuity (BCVA) of 0.10 LogMAR or better in both eyes. - Regular user of digital devices (e.g., smartphones, tablets, or computers) for at least 5 days per week, with continuous use of at least 2 hours per day. - Voluntarily agrees to participate in the study and signs the written informed consent form.
Exclusion criteria
Exclusion criteria: - Severe dry eye (NITBUT <5 seconds). - Diagnosed or suspected ocular diseases/pathologies (e.g., pinguecula, pterygium, cataract, glaucoma, conjunctivitis, macular degeneration). - History of ocular surgery or laser treatment within the past 6 months. - Presence of binocular vision anomalies. - Current use of eye drops or oral medications that may affect the tear system or extraocular muscle function (e.g., hormonal antagonists, antihistamines, muscle relaxants). - Regular smoking or excessive alcohol consumption. - Chronic sleep deprivation (<6 hours per night) during the week prior to the experiment.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Eye strain symptoms Immediately post-intervention Visual acuity, (Positive relative accommodation, Negative relative accommodation, Accommodation facility,Near point accommodation,Near point of convergence, Positive fusional vergence | — |
Secondary
| Measure | Time frame |
|---|---|
| Dry eye symptoms Immediately post-intervention Ocular surface disease index questionnaire, Non invasive tear break up time, Tear meniscus height | — |
Countries
Thailand
Contacts
Public ContactPattareeya Sereesantiwong
NU
Outcome results
None listed