Clinical and Genetic Studies of Families With Congenital or Hereditary Cataracts
Public ClinicalTrials.gov record NCT00056771. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Clinical and Molecular Studies in Families With Congenital or Hereditary Cataracts
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will explore the clinical and hereditary (genetic) features of inherited cataracts. A cataract is a clouding of the eye lens, which focuses light on the back of the eye. When the lens becomes cloudy and does not let light through, vision is impaired. Cataracts may be associated with vision problems alone, or with other problems, such as changes in facial appearance or skin problems. A better understanding of these genetic conditions may help in the development of better diagnostic tests. Patients with inherited cataracts and their family members may be eligible for this study. Participants will be drawn from patients enrolled in other studies of inherited cataracts at the NEI and collaborating clinics. Participants will undergo the following tests and procedures: * Medical and surgical history; * Verification of diagnosis; * Construction of a family tree regarding familial vision problems; * Complete eye examination, including dilation of the pupils and photography of the lens, tests of color vision and field of vision, and of the ability to see in the dark; * Blood sample collection (20 ml, or 4 teaspoons) for genetic studies of hereditary cataracts.
Study identification
- NCT ID
- NCT00056771
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 3,432 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 4 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 17, 2003
- Primary completion
- Not listed
- Completion
- May 24, 2016
- Last update posted
- Apr 4, 2018
2003 – 2016
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda | Maryland | 20892 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 4 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00056771, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 4, 2018 · Synced Sep 8, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00056771 live on ClinicalTrials.gov.