None listed
Conditions
Interventions
Intervention1: Standardized Brightness x24 hours x 7 days x 8 weeks: (~150cd/m^2) Standardization of screen brightness for smartphones, tablets and laptops of all participants
Control Intervention1: n
Sponsors
K.S. Hegde Medical Academy
Eligibility
Inclusion criteria
Inclusion criteria: - Refractive status emmetropia (between 0.50D to +1.00D or low-to-moderate myopia, 0.50D to 3.00D) - Refractive astigmatism less than 0.50D cylinder - Corrected visual acuity of zero log MAR (or better) in both eyes - Normal binocular vision and accommodative function.
Exclusion criteria
Exclusion criteria: -A minimum screen-time of 2 hours/day -History of ocular (including refractive) surgery -Current ocular pathology(e.g. cataracts, glaucoma, AMD, corneal disease, diabetic retinopathy, conjunctivitis) -Autoimmune diseases or medications (e.g. isotretinoin, anticholinergics) affecting vision or tear film -Recent contact lens wear(24-48 hours) -Pregnancy (to exclude hormonal influences on tear film)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| correlation between -change in visual function parameters -screen-timeTimepoint: week 8 | — |
Secondary
| Measure | Time frame |
|---|---|
| contrast sensitivity Timepoint: baseline, week 1, week 4, week 8;color sensitivity, Timepoint: baseline, week 1, week 4, week 8;Tear Film Breakup Time Timepoint: baseline, week 1, week 4, week 8;Schirmer test values Timepoint: baseline, week 1, week 4, week 8;best corrected visual acuityTimepoint: baseline, week 1, week 4, week 8;device logged screen-time in hours/week for all devices owned by each participant Timepoint: daily | — |
Countries
India
Contacts
Public ContactDr Maria Loraine Lydia
K.S. Hegde Medical Academy
Outcome results
None listed