University of Waterloo scientists discovered the benefits of coffee for visual acuity and also improves response. This is reported in an article published in the journal Psychopharmacology.
Visual acuity refers to a person's ability to detect and recognize fine details and can be measured under static (stationary) or dynamic (moving) conditions. Dynamic visual acuity is especially important in many daily activities. In a new study, researchers examined how caffeine improves visual processing.
The study involved 21 volunteers. On one day they took a caffeine capsule (at a dose of four milligrams per kilogram), and on the other day, a placebo capsule. Using a computerized test developed and validated at the University of Waterloo, each participant was measured for dynamic visual acuity skills one hour and one hour after ingestion of caffeine.
Participants who took caffeinated capsules showed significantly greater and better accuracy. high speed when detecting moving targets of small size. Eye speed and contrast sensitivity, which affect dynamic visual acuity, were also sensitive to caffeine intake. Consuming caffeine can be beneficial for a person's visual function by increasing alertness and a sense of wakefulness, according to scientists. This is important for driving, cycling or playing sports.