Contrast sensitivity Caffeine Visual performance Sports vision Caffeine Contrast Sensitivity Visual Acuity Football Athletes Dietary Supplements Students
Conditions
Interventions
A single oral dose of caffeine 300 mg tablet, administered once, 45 minutes before post-test assessment,A single oral dose of placebo tablet (identical in appearance to caffeine tablet), administered
Experimental Dietary Supplement,Placebo Comparator Dietary Supplement
Caffeine Group,Placebo Group Comparator
Sponsors
Rangsit University
Eligibility
Sex/Gender
Male
Age
18 Years to 26 Years
Inclusion criteria
Inclusion criteria: 1.Male participants in good general health 2.Aged 18 to 26 years 3.Body weight between 50to80 kg 4.Students at Rangsit University 5.Regularly played football more than 3 days per week for a continuous period of at least 6 months 6.Regular caffeine consumers with daily intake not exceeding 400 mg per day 7.No color vision deficiency assessed by H.R.R. 8.No stereopsis deficit Stereopsis more than 40 seconds of arc 9.No strabismus like esotropia or exotropia 10.No severe dry eye TBUT more than 5 sec OSDI score less than 33 11.No history of ocular surgery or trauma 12.No caffeine intolerance or allergy 13.Slept at least 7 hours prior to the test session
Exclusion criteria
Exclusion criteria: 1. Female sex 2. Age below 18 or above 26 years 3. Body weight below 50 kg or above 80 kg 4. Non-students or students outside Rangsit University 5. Played football fewer than 3 days per week or for less than 6 continuous months 6. Daily caffeine intake exceeding 400 mg/day 7. Known color vision deficiency 8. Stereopsis deficit (Stereopsis less than 40 seconds of arc) 9. Presence of strabismus (esotropia, exotropia or phoria requiring treatment) 10. Severe dry eye (TBUT less than 5 sec or OSDI score more than 33) 11. History of ocular surgery or ocular trauma 12. Known caffeine intolerance or allergy 13. Less than 7 hours of sleep prior to the test session 14. Caffeine consumption within 12 hours before the test session
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Contrast Sensitivity at 6 cycles per degree (Row C) under photopic conditions Baseline (pre-test) and 45 minutes after caffeine or placebo consumption (post-test) Vision Contrast Sensitivity Test System (VCTS 6500), CSV1000E Contrast Chart | — |
Secondary
| Measure | Time frame |
|---|---|
| Contrast Sensitivity at 1.5, 3, 12, and 18 cpd (Row A, B, D, E) under photopic conditions Baseline and 45 minutes post-consumption Vision Contrast Sensitivity Test System (VCTS 6500), CSV1000E Contrast Chart | — |
Countries
Thailand
Contacts
Public ContactAkachai Pokaisasawan
Faculty of Optometry, Rangsit University
Outcome results
None listed