Skip to content
Back to Digital Eye Strain

ingestible · for digital eye strain

Bilberry Extract (Vaccinium myrtillus)

Reviewed by the Nimbera editorial team · Last updated May 2026

Kosehira, Machida & Kitaichi (2020, Nutrients, PMID 32106548) conducted a 12-week randomised, double-blind, placebo-controlled parallel-group trial (n=109 adults, ages 20-60). Participants taking 240 mg standardised bilberry extract daily showed significantly improved post-VDT-task ciliary muscle high-frequency component values at weeks 8 and 12 vs. placebo (p=0.014 and p=0.017), indicating reduced accommodative fatigue.$15-$30 per month for 240 mg standardised extract.

How to use

Take 240 mg of standardised bilberry extract daily. Benefits were observed from week 8 onward in the clinical trial - expect at least 2 months of consistent use before assessing effect.

How it works

Bilberry anthocyanins are believed to improve microcirculation in ocular tissues and protect against oxidative stress in the retina and ciliary body. The ciliary muscle controls the eye's focusing (accommodation) mechanism; reduced tonic spasm in this muscle translates to less fatigue and blur after screen work.

Where to buy

Health food stores and online. Look for extracts standardised to 25% anthocyanins. Vitaberry and similar standardised forms are widely available.

Typical cost: $15-$30 per month for 240 mg standardised extract.

Safety notes

Bilberry is generally well tolerated. Theoretically may have mild antiplatelet effects - discuss with a doctor before use if taking blood thinners. Safety data in pregnancy and breastfeeding is limited; avoid unless under medical guidance.

Drug & supplement interactions

  • Always tell your doctor or pharmacist about any supplements you take.
  • Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
  • Herbal remedies can affect how the body absorbs or metabolises drugs.
  • Check drugs.com interactions checker before starting.

Clinical source

Kosehira M, Machida N & Kitaichi N, A 12-Week-Long Intake of Bilberry Extract Improved Objective Findings of Ciliary Muscle Contraction of the Eye, Nutrients, 2020

This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.