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Sponsored by: |
National Eye Institute (NEI) |
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Information provided by: | National Institutes of Health Clinical Center (CC) |
ClinicalTrials.gov Identifier: | NCT00001312 |
Clouding of the lens, or cataract formation, accounts for vision loss in about 45 percent of the U.S. population aged 75 to 85 years. Macular degeneration-destruction of the part of the retina responsible for central vision used in reading-is the leading cause of legal blindness in people over 60 years of age.
This 10-year study on age-related macular degeneration and cataract will investigate:
Patients with age-related macular degeneration or cataract will be evaluated for their eligibility in this study with a medical history, vision test and thorough eye examination, including photographs of the lens and back of the eye. Those accepted to the study will be randomly assigned to take one of the following 4 times a day: 1) a vitamin only; 2) a mineral only; 3) both a vitamin and a mineral; or 4) a placebo (a tablet with no active ingredient). A blood sample will be drawn at the beginning of the study and once a year until its end to measure vitamin and mineral blood levels and to study their effects on cholesterol. Participants will be asked to complete a voluntary questionnaire about their visual function and how it affects their daily lives.
Some patients may be asked to participate in two interviews about 6 months apart, in which they will provide information on their food intake over a 24-hour period. This information will be used to explore possible dietary risk factors for macular degeneration and cataract. Participants may also be asked to provide a small blood sample for use in studying possible hereditary factors associated with age-related macular degeneration. This research may lead to a better understanding of why the condition develops, who is likely to be affected and to what degree, and how to improve treatment.
Condition | Intervention |
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Cataract Macular Degeneration |
Drug: Vitamin and/or Mineral Supplement Drug: Vitamins and Minerals |
Study Type: | Interventional |
Study Design: | Treatment |
Official Title: | Age-Related Eye Disease Study - Follow-Up |
Estimated Enrollment: | 200 |
Study Start Date: | August 1992 |
Estimated Study Completion Date: | March 2008 |
The purpose of this ancillary study is to evaluate the feasibility of studying zinc metabolism in Age-Related Eye Disease Study (AREDS) participants. All 127 AREDS participants currently followed by the National Eye Institute Clinical Center will be approached for consent. In addition to the assessment of zinc functional status, parameters of antioxidant defense and immune function capacities will be measured in consenting participants to describe the effects of zinc supplementation on these measures in this population. Results from this pilot study will be used to evaluate the feasibility of expanding enrollment to participants from other AREDS clinical centers.
Ages Eligible for Study: | 55 Years to 80 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
To be eligible for enrollment, potential participants must meet all of the following criteria:
Enrolled in AREDS
Followed by the NEI Clinical Center
Signed the informed consent statement for this Ancillary study.
EXCLUSION CRITERIA:
Demonstrated inability to comply with blood drawing procedures.
United States, Georgia | |
Emory University | |
Atlanta, Georgia, United States, 30322-1102 | |
United States, Illinois | |
Ingalls Memorial Hospital | |
Harvey, Illinois, United States, 60426-3591 | |
United States, Maryland | |
Johns Hopkins University | |
Baltimore, Maryland, United States, 21205 | |
University of Maryland, Baltimore | |
Baltimore, Maryland, United States, 21201-1595 | |
National Institutes of Health Clinical Center, 9000 Rockville Pike | |
Bethesda, Maryland, United States, 20892 | |
United States, Massachusetts | |
Massachusetts Eye and Ear Infirmary | |
Boston, Massachusetts, United States, 02114-3096 | |
United States, Michigan | |
Associated Retinal Consultants, PC | |
Royal Oak, Michigan, United States, 48073 | |
United States, New York | |
Albany Medical College | |
Albany, New York, United States, 12208 | |
United States, Ohio | |
Ohio State University | |
Columbus, Ohio, United States, 43210-1240 | |
United States, Oregon | |
Deavers Eye Institute | |
Portland, Oregon, United States, 97210-3065 | |
United States, Pennsylvania | |
Eye and Ear Institute of Pittsburgh | |
Pittsburgh, Pennsylvania, United States, 15213-2582 | |
United States, Wisconsin | |
University of Wisconsin | |
Madison, Wisconsin, United States, 53792 |
Study ID Numbers: | 920250, 92-EI-0250 |
Study First Received: | November 3, 1999 |
Last Updated: | March 28, 2008 |
ClinicalTrials.gov Identifier: | NCT00001312 |
Health Authority: | United States: Federal Government |
Age-Related Macular Degeneration Cataracts Natural History Study Clinical Trial Randomized |
Vitamins Minerals Serum Zinc Levels Oxidative Stress Defense |
Eye Diseases Cataract Zinc Retinal Degeneration Stress |
Macular Degeneration Lens Diseases Retinal Diseases Retinal degeneration |