Effects of Lycium Barbarum Supplements on the Progression of Senile Cataract in Hong Kong Chinese Population


With the rapid growing aging population, age-related eye diseases including cataract are becoming more prevalent. The demand for cataract surgery and post-surgical care posed enormous financial burdens to the government. Lycium barbarum contains lutein and zeaxanthin which can filter the phototoxic blue light and neutralize the reactive oxygen species, thus provide a protective effect against cataract formation. This study aims to determine the effects of Lycium barbarum Supplements on the progression of senile cataract in Hong Kong Chinese elderly.

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Prevention
    • Masking: Double (Participant, Outcomes Assessor)
  • Study Primary Completion Date: April 2012

Detailed Description

Please note that a manuscript for this study is being prepared. Detailed description will be provided after we come up with the final draft.


  • Dietary Supplement: Starch
    • 1350mg/day
  • Dietary Supplement: Lycium Barbarum
    • 1350mg/day

Arms, Groups and Cohorts

  • Active Comparator: Placebo
    • Starch
  • Experimental: Lycium Barbarum
    • Lycium Barbarum supplement

Clinical Trial Outcome Measures

Primary Measures

  • Lens Opacity Classification System III (LOCSIII)
    • Time Frame: 3 years

Secondary Measures

  • Visual Acuity
    • Time Frame: 3 years

Participating in This Clinical Trial

Inclusion Criteria

  • Unlikely to have cataract surgery within 3 years – Presence of mild to moderate cataract in one or both eyes, graded by Lens Opacities Classification System III (LOCSIII). – logMAR acuity equivalent to Snellen acuity of 20/63 or better – no previous history and clinical signs of glaucoma by determining intraocular pressure using applanation Tonometry (no more than 22mmHg) – no ocular anomalies: amblyopia, binocular anomalies, ocular trauma – no history of eye surgery, laser treatment, iritis, retinal crystalline deposits, macular degeneration, or optic nerve diseases – no extended use of systemic or ocular corticosteroid drugs – no concurrent participation of other systemic or ocular drug intervention study Exclusion Criteria:

  • diabetes mellitus – renal failure – fat malabsorption syndrome – intestinal surgery history – chronic diarrhea – alcoholism – use of anticoagulants – regular use of nutritional supplements such as multi-vitamin, mineral and other antioxidant supplements (including Omega-3)

Gender Eligibility: All

Minimum Age: 60 Years

Maximum Age: 75 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • The Hong Kong Polytechnic University
  • Collaborator
    • The Hong Kong Jockey Club Charities Trust
  • Provider of Information About this Clinical Study
    • Principal Investigator: Chea-su Kee, Associate Professor – The Hong Kong Polytechnic University
  • Overall Official(s)
    • Chi-wai Do, PhD, Principal Investigator, The Hong Kong Polytechnic University
    • Chea-su Kee, PhD, Principal Investigator, The Hong Kong Polytechnic University

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