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Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts Clinical Trials Data presented on Clinical Trials Search is not meant to be a substitute for qualified health advice, visits or treatment with a real mD. We are not doctors. Always consult your doctor about Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts conditions. Clinical Trials Search.org is a site devoted to listing clinical research studies in human subjects. Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts Clinical research trials and Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts healthcare trials happen in many of places across the United States. A clinical trial or clinical study is a research project with human volunteer subjects. Clinical drug trials and pharmaceutical clinical trials generally assess the effectivity of new drugs. The purpose of the studies / projects is to solve particular human medical questions. Clinical trials are a popular way for doctors, government agencies, and private sector companies to discover cures for all varieties of conditions, such as Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts. Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts Clinical Trials and other clinical trials allow volunteers to have health treatment alternatives before they are available to the masses. Some times the human subjects obtain treatment for without cost, and sometimes they are compensated for their time. Occasionally there is a cost for a Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts clinical trial. Test subjects oftentimes receive the most effective healthcare possible for their Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts condition. Dangers are a reality, however, and may include extra or frequent physician visits, healthcare dangers (possibly life-jeopardising), and/or the treatment being uneffective. Trials are federally governed with rigorous guidelines to protect clinical trials patients.
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Home > "D" Clinical Trials Conditions > Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts  Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts
Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts
For Condition: Cataract,Healthy
Status: Completed
Sponsor(s): National Eye Institute (NEI) ,
Synopsis: This study will use a newly developed instrument called dynamic light scattering device (DLS) to examine age-related changes in the human lens and to study the causes and development of cataracts. DLS uses a low intensity laser light (similar to that used in supermarket checkouts) to measures lens cloudiness. It detects changes in the human lens at the earliest stages, when anti-cataract treatment would be most effective in reversing, delaying or preventing cataract formation. Patients 18 years of age and older with cataracts and normal volunteers between the ages of 18 and 70 years may be eligible for this study. Participants will have a standard eye examination, including a vision check, pressure measurement, lens examination using DLS and examination of the retina. Photographs of the lens or retina, or both, may be taken. This study does not involve treatment. No anti-cataract medications will be given.
Details: Recently, a device has been created to determine molecular interactions that occur in the nucleus of the lens, called Dynamic Light Scattering Device (DLS). Preliminary studies have shown its potential in the detection of the earliest changes occurring in cataract, at the stage where anticataract treatment would theoretically be most effective in reversing, delaying or preventing cataracts. A new miniaturized version of this device has been developed by NASA using lower energy lasers and offered for further development and testing at the NEI. We recently conducted a pilot study to evaluate the usefulness and reproducibility of this instrument for quantitating lens changes, and found good reproducibility. We also determined that the most useful parameter to use is mean particle size derived from particle size distribution. We therefore propose to conduct a study on changes on the lens due to aging (age related changes), as well as on the three representative types of cataracts (nuclear, cortical and PSC).
Eligibility:
Study Type: Observational, Natural History
Minimum Age/Maximum Age: /
Genders: Both
Protocol Entry Criteria: INCLUSION: Patients 18 years or older will be admitted to this study. There will be no gender or sex bias in the recruitment. Fifteen subjects (30 eyes) who are normal volunteers of either sex, 3 for each decade from 18-70, will be recruited. These normal volunteers should have clear lenses with LOCS II clinical score for nuclear opalescence of 0.5 or less. Three patients (18 eyes) for each major type of cataract (nuclear, cortical and PSC), will be recruited also for evaluation with the DLS device. All 3 types of cataracts will be graded using the LOCS II system and will have a clinical score of at least one. EXCLUSION: Patients who have uveitis, glaucoma and who are thought to be at risk for an adverse reaction to pupil dilation, or have a history of allergic reaction to one of the dilating agents that will be used.
Total Enrollment: 24
Location and Contact Information:
National Eye Institute (NEI)
Bethesda, Maryland, 20892
United States
Additional Information:
Study ID Numbers: 010051; 01-EI-0051
Study Start Date: December 13, 2000
Record last reviewed: February 10, 2004
Additional information available at: clinicaltrials.gov
Clinicaltrials.gov Reference link: NCT00007215
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Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts
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