Quick Navigation

Visual Acuity

Kamal
Research analysis lead by Kamal Patel
All content reviewed by Examine.com Team.
Published:
Last Updated:

Summary of Visual Acuity

Primary Information, Benefits, Effects, and Important Facts

Scientific Information on Visual Acuity


Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect visual acuity
Grade Level of Evidence
Robust research conducted with repeated double-blind clinical trials
Multiple studies where at least two are double-blind and placebo controlled
Single double-blind study or multiple cohort studies
Uncontrolled or observational studies only
Level of Evidence
? The amount of high quality evidence. The mo re evidence, the more we can trust the results.
Outcome Magnitude of effect
? The direction and size of the supplement's impact on each outcome. Some supplements can have an increasing effect, others have a decreasing effect, and others have no effect.
Consistency of research results
? Scientific research does not always agree. HIGH or VERY HIGH means that most of the scientific research agrees.
Notes
grade-c Ginkgo biloba Minor - See study
Improvements have been noted in the visual field in persons with normal tension glaucoma, which is characterized by damage to this parameter. It is uncertain whether ginkgo increases visual acuity in otherwise healthy persons.
grade-c Saffron Minor Very High See 2 studies
Supplementation of saffron appears to increase visual acuity in persons with age-related macular degeneration.
grade-c Caffeine - - See study
No significant influence on visual acuity has been noted with caffeine on hand-eye or target-based visual tasks
grade-d CDP-choline Minor - See study
In persons with glaucoma, CDP-Choline ingestion appears to be somewhat protective of vision and has been noted to cause improvements in visual acuity
grade-d Marijuana  
grade-d Ruscus aculeatus  

All comparative evidence is now gathered in our ​A-to-Z Supplement Reference.

The evidence for each separate supplement is still freely available ​here.