The Effect of Orally Administered Extracts of Chokeberry, Kamchatka Berry and Blueberry on the Condition of the Eye.

This study evaluated whether a standardized berry-extract dietary supplement (AKB; Aronia melanocarpa, Lonicera caerulea, Vaccinium myrtillus) improves visual function in adults with presbyopia. In a randomized, double-blind, placebo-controlled two-period crossover design, participants received AKB 400 mg twice daily and placebo for 6 weeks each, separated by a 5-week washout. Visual function and retinal/neuronal measures were assessed with contrast sensitivity testing, visual fields, VEP, and OCT/AngioOCT. Serum biomarkers related to lens and retinal physiology were also measured.

NCT Number	NCT07382882
Lead Sponsor	Wroclaw Medical University
Conditions	Presbyopia
Enrollment	27 participants
Start Date	2022-11-03
Primary Completion	2023-03-07 (estimated)
Study Completion	2025-08-15 (estimated)
Updated on ClinicalTrials.gov	2026-02-06